Nature 
Supporter 
Arts Unit Introduction
Ardelia is a 6-star character in Arknights: Endfield (AKE). Ardelia wields an Arts Unit and belongs to the Supporter class. Ardelia also has access to the Nature element. This guide provides a comprehensive overview of Ardelia's best build, including recommended Weapons, Gear pieces, Stats, and the strongest team compositions and rotations that maximize their potential.
Attributes
Pros & Cons
Pros
- ●Applies long-duration Arts and Physical Susceptibility.
- ●Incredibly generic and is able to buff most teams well.
- ●Multiple sources of healing, capable of healing the controlled operator and the team.
- ●Forcibly applies Corrosion, which can be useful to other characters.
- ●Consumes Arts Reactions routinely, which can also be useful to some characters.
- ●She's free!
- ●Mr. Dolly.
Cons
- ●Can become locked out of Combo Skill in teams with lingering Infliction/Vulnerability stacks.
- ●Requires up-front SP investment for her main damage buff.
Lore
"This world has so many mysteries to uncover. We should get to know it better just like ... like how we should learn more about ourselves. Don't you agree, Professor?" Ardelia is a Rhodes Island operator assigned to Endfield Industries where she serves as an expert geologist under the framework agreement between the two companies. Ardelia's early work centered on volcanoes, but today her research extends into Ætherside and geological disasters. She spends most of her time in the field, venturing alone into disaster sites to collect samples, analyze structures, and develop theories that have become the cornerstone of Endfield's Blight countermeasures. Always humble and polite, she carries an inner strength that never seems to run dry. To her, happiness is simple: climbing another mountain, walking another path, hearing the voices of the world, and uncovering the hidden wonders of this planet. And if you can become good friends with Ardelia, then Mr. Dolly is sure to like you too.
Skill Priority
Off Field: Battle Skill > Combo Skill > Ultimate = Basic Attack
Skills
Rocky Whispers
BASIC ATTACK:An attack with up to 4 sequences that deals Nature DMG. As the controlled operator, Final Strike also deals 18 Stagger.DIVE ATTACK:Basic attack performed in mid-air becomes a dive attack that deals Nature DMG to nearby enemies.FINISHER:Basic attack performed near a Staggered enemy becomes a finisher attack that deals massive Nature DMG and recovers some SP.
| Stat | Value |
|---|---|
| BATK SEQ 1 Multiplier | 68% |
| BATK SEQ 2 Multiplier | 90% |
| BATK SEQ 3 Multiplier | 118% |
| BATK SEQ 4 Multiplier | 124% |
| Finisher ATK Multiplier | 900% |
| Dive ATK Multiplier | 180% |
Dolly Rush
Hops on Mr. Dolly and rams the target to deal Nature DMG. If the target has Corrosion, then consume the Corrosion and apply Physical Susceptibility and Arts Susceptibility to the target.
| Stat | Value |
|---|---|
| DMG Multiplier | 320% |
| Stagger | 10 |
| Susceptibility | 20% |
| Susceptibility Duration (s) | 30 |
Eruption Column
Launches a homing Volcanic Cloud at a target enemy that deals Nature DMG when close enough to the target. The Volcanic Cloud explodes after a short delay, dealing half of the Nature DMG and forcibly applying temporary Corrosion to nearby enemies.
| Stat | Value |
|---|---|
| DMG Multiplier | 100% |
| Explosion DMG Multiplier | 250% |
| Stagger | 10 |
| Corrode Duration (s) | 7 |
Wooly Party
Ardelia enters a mobile channeling state and summons the aid of Mr. Dolly. Multiple copies of Mr. Dolly are thrown in random directions. Each copy deals Nature DMG. Each enemy can only take 1 damaging hit every 0.3s.
| Stat | Value |
|---|---|
| Cooldown | 15 |
| DMG Multiplier | 165% |
| Stagger | 3 |
| Duration (s) | 3 |
Talents
Assign to Reception Room to grant operator clue collecting efficiency +20/30%.
Assign to Reception Room to slow Mood Drop of all operators in it by 14/18%.
The battle skill Dolly Rush creates 3 Shadows of Mr. Dolly after hitting the enemy. The copies of Mr. Dolly scattered by the ultimate Wooly Party also has a 10% chance to create Shadows of Mr. Dolly when they fall to the ground.When the controlled operator touches a Shadow of Mr. Dolly, Ardelia restores the said operator's HP by [45 + WillÃ0.38]/[63 + WillÃ0.53]/[90 + WillÃ0.75].If the controlled operator is already at max HP, then restore the HP of the teammate with lowest percentage HP. Shadows of Mr. Dolly lasts for 10s and up to 10 can exist in the battlefield.
Battle skill Dolly Rush improved: Triggering the additional effect while an enemy with Corrosion is nearby immediately casts the battle skill again. This effect only triggers once per active battle skill casting.
Potentials
Battle skill Dolly Rush improved: Consuming Corrosion now applies Physical Susceptibility and Arts Susceptibility with effects +8%.
Talent Friendly Presence improved: When the controlled operator touches the Shadow of Mr. Dolly, Ardelia also treats another allied operator with the lowest percentage HP with half of the treatment effects.
Ultimate Wooly Party improved: Duration +1s; chance to create Shadow of Mr. Dolly is increased to 1.2 times the original.
Ultimate Wooly Party improved: Ultimate Energy cost -15%.
Combo skill Eruption Column improved: Length of cooldown -2s; DMG multiplier is increased to 1.2 times the original; duration of Corrosion applied +4s.
Recommended Weapons
Ardelia best Weapons are placed in order of what fits their playstyle the most. Check the comments to get additional context.
Stat 1 Boost - 9/9Intellect: +156Stat 2 Boost - 9/9Treatment Bonus: +46.40%Passive Boost - 4/9Sec. Attribute: +25.60%After the wielder consumes Corrosion, target enemy suffers Arts DMG taken +16% for 25s. Effects of the same name cannot stack.
Ardelia's signature is definitely her best choice when supporting Arts teams. It has great passive stats for her and after she consumes Corrosion to apply her Susceptibility, she also applies an Arts Damage Taken debuff for a long duration, as well as massively increasing her ability to boost the team's Arts Damage. The one catch with this weapon is that it does nothing for Ardelia when she's supporting Physical teams.
Stat 1 Boost - 9/9Intellect: +124Stat 2 Boost - 9/9Attack: +31.20%Passive Boost - 9/9Max HP: +28.00%After the wielder casts an Ultimate, Operators whose elements differ from the wielder gain ATK +22.4% for 20s. Effects of the same name cannot stack.
When playing Ardelia in Physical teams, Starry Beach cannot be used, so this weapon is the replacement. It has servicable stats for Ardelia, but more importantly, grants all non-Nature Operators a large attack boost for a long duration after she uses her Ultimate. This is still a decent boost to Ardelia's teamwide damage boosting capabilities, but it isn't quite as impactful as her Signature is for Arts teams.
Gear Sets
Ardelia best sets are placed in order of what fits their playstyle the most. Check the comments to get additional context.
Flat HP +1000. When the wearer applies Amp, Protected, Susceptible, or Weakened, other teammates also gain DMG Dealt +16% for 15s. This effect cannot stack.
Eternal Xiranite is the go-to 3P set for all supports capable of activating its team-wide buffing effect and who can also benefit from the large amounts of Ultimate Gain each of its pieces provides. Ardelia applies Susceptibility frequently via her battle skill, which can trigger the 3P bonus, granted not as frequently or consistently as some other characters, meaning maximum uptime might need to be helped along by another Operator on this set as well. The INT, WILL and Ultimate Gain heavy pieces are all exactly what she's looking for from her gear.
Dupes Review
Battle skill Dolly Rush improved: Consuming Corrosion now applies Physical Susceptibility and Arts Susceptibility with effects +8%.
Increases the Susceptibility applied by Ardeliaâs Battle Skill by a notable flat amount, boosting her supportive capabilities nicely. Ends up being a nice upgrade to any team sheâs supporting, making it one of her most impactful potentials.
Talent Friendly Presence improved: When the controlled operator touches the Shadow of Mr. Dolly, Ardelia also treats another allied operator with the lowest percentage HP with half of the treatment effects.
Significantly improves the healing from Ardeliaâs talent, causing it to treat the lowest HP operator in addition to the controlled operator, but at 50% of the value. When things get tough, ends up being a 1.5 times healing increase.
Ultimate Wooly Party improved: Duration +1s; chance to create Shadow of Mr. Dolly is increased to 1.2 times the original.
Increase the channelling duration of Ardeliaâs Ultimate by one second from 3 to 4, increasing the number of Dollyâs she summons, while also improving the hit count of the Ultimate. Also increases the total amount of Shadows of Mr. Dolly, the Ultimate summons, on average by 1.2 times, giving you more sheep to collect for healing.
Ultimate Wooly Party improved: Ultimate Energy cost -15%.
Reduces Ardeliaâs Ultimate cost by -15%, taking it from 90 to 77, improving accessibility to sustain in fights while also boosting the potential of Ultimate triggering weapons.
Combo skill Eruption Column improved: Length of cooldown -2s; DMG multiplier is increased to 1.2 times the original; duration of Corrosion applied +4s.
Reduces the cooldown of Ardeliaâs combo by 2 seconds, improves its damage (unique multiplier), and also extends its Corrosion duration by 4 seconds, taking it from 7 seconds to 11. The cooldown reduction of this potential is a nice bonus, which makes maintaining Ardeliaâs Susceptibility easier, and which also boosts synergy with characters that make use of her Corrosion. The extra duration on Corrosion is very nice in encounters where you donât find yourself consuming her Corrosion every combo, and leave it active some of the time. However, it won't be as powerful in shorter fights or fights with continually new enemies where you do.
Calculations
Ardelia is a Support, hence there will be no calculations available for them.
Team Compositions
Synergies
Ardelia is a universal unit able to be played in almost any team, with the exception of teams that leave lingering Inflictions, which lock out the use of her Combo skill. Because of that, she can synergize with almost any team composition. Here's what she can do:
- ●Sheâs able to permanently maintain both Arts and Physical Susceptibility on targets for generic team-wide damage increases that work in any team.
- ●Outstanding supportive weapon and set options for even more damage amplification, with options that work for both Physical and Arts.
- ●Forcibly applies Corrosion, which, when optimized around, can lower enemy resistances to all damage temporarily if Susceptibility doesn't need to be refreshed.
- ●Only requires 100 SP roughly every 30 seconds to function at maximum capacity.
- ●Strong enough sustain to single handedly keep the team alive through most endgame encounters as long as smart dodging is used.
Overview
Kit Intro
Ardelia is a 6-star, Nature, Arts Unit support who specializes in applying long-lasting arts and Physical Susceptibility to targets by combining her combo and Battle Skills. This makes her a universal buffer, capable of being useful in almost any team you’re able to consistently activate her combo in. To activate said combo, she requires you land a Final Strike on a target with no Vulnerable or Arts Infliction stacks, which can either be trivial or quite tricky depending on your team. In teams where you consistently burn through your arts/Vulnerability stacks, Ardelia can easily slot in. However, in teams that have lingering stacks, she can end up locked out of her combo for extended periods of the fight, hurting or blocking her ability to do her job.
Assuming you’re playing Ardelia in a team that works for her, she also brings other perks on top of her consistent debuffing. Examples are the ability to spawn healing sheep via her Battle Skill and Ultimate, which when collected, heal the controlled operator or the lowest percentage teammate, helping keep your team alive in tougher battles. Ardelia’s combo also forcibly applies Corrosion without the need to trigger it via an Arts Reaction. Usually, she consumes this herself in order to apply her debuffs with her Battle Skill, but in some teams, just applying it can be important for enabling combos like Laevatain’s.
As long as your team doesn’t completely lock out Ardelia’s combo, and you have a small amount of SP to commit to her Battle Skill every so often, she’ll always be a solid choice for damage Amplification and survival, no matter the team.
Combo
Ardelia’s combo is the foundation of her buffing/debuffing ability, making it one of her most essential abilities. It requires the controlled operator to perform a Final Strike against an enemy with no Arts Infliction or Vulnerability stacks to trigger. This causes Ardelia to attach a bomb to the target enemy that explodes after a short duration, forcibly applying Corrosion to them and surrounding enemies for a short duration. This [Corrode] doesn’t require or consume any other Arts Inflictions when being applied and is primarily used as a resource to empower her Battle Skill. It still works the same as normal Corrode that scales with Arts Intensity if you want to use it for that reason as well.
**Tip: **One of the main considerations when team building with Ardelia is whether your team is likely to have lingering Inflictions or Vulnerability stacks that aren’t routinely consumed. If so, Ardelia may end up locked out of her Combo Skill for extended periods of time, hurting her viability.
Battle Skill
Ardelia’s Battle Skill is the bread and butter of her damage Amplification. At a base, all it does is cause Ardelia to charge forward toward an enemy, hitting for Nature damage after a short delay. However, if the enemy has [Corrode] when her charge collides, she’ll instead consume the [Corrode] stack and apply a 30-second Arts and Physical Susceptibility to the target, boosting the damage of every major element in the game against them. This is a debuff you’ll definitely want to maintain the majority of the fight on high-priority targets. This debuff is one of the main reasons you consider bringing Ardelia to teams.
**Tip: **Ardelia’s combo and Battle Skill both have very noticeable delays in connecting to the enemy. Don’t waste time waiting for them to complete; instead, fill the delay with other operators’ abilities.
Talents
Ardelia’s first talent, Friendly Presence, is one of the most important parts of her kit and the source of the majority of her healing capabilities. Unlocking it grants her Battle Skill and Ultimate, the ability to summon “shadows of Mr. Dolly” to the field for 10s. These shadows are collectables in the form of sheep that, when touched by the controlled operator, heal them for a flat amount plus a percentage of Ardelia’s Will stat. Only 10 shadows can exist at once.
Ardelia’s Battle Skill scatters 3 shadows, while her Ultimate scatters a random but, in most cases, higher amount. Also, if the controlled operator is already at max HP, the healing is transferred to the lowest HP operator instead, allowing Ardelia to serve as a full team healer as well. Go sheep hunting if you’re running low on health!
Note: Operators you aren’t controlling cannot collect shadows and will simply pass through them.
Ardelia’s other talent, Mountainpeak Surfer, allows Ardelia to gain a free Battle Skill cast under certain conditions. After consuming [Corrosion] by using her Battle Skill normally, if another enemy nearby still has [Corrosion], Ardelia will retarget them and perform a follow-up Battle Skill in order to consume their Corrosion as well. This effect doesn’t consume SP but can only happen once per Battle Skill.
Ultimate
Ardelia’s Ultimate’s main function is to trigger her talent, Friendly Presence. It costs 90 energy to use, and causes Ardelia to channel an eruption for 3 seconds, which spews out copies of Mr. Dolly into the air, which deal damage and a small amount of Stagger to enemies they land on. Each has a 10% chance to be converted into Shadows of Mr. Dolly by Ardelia’s talent. The main purpose of using this Ultimate is either for keeping the team alive or triggering weapons that activate when using Ultimates. Outside that, the extra Stagger and damage can sometimes be helpful too.
Note: Even if the Dollys from the eruption all luckily land on the same enemy in short succession, enemies can only take damage/Stagger from this ability once every 0.3 seconds, limiting it to 10 hits total.
Gameplay
Ardelia’s gameplay is very simple and revolves entirely around keeping her Susceptibility on your primary target in most cases. To do so:
- At the start of fights, start with a Final Strike before applying your Vulnerable/Inflictions to get Ardelia’s combo in rotation.
- During the fight, ensure you weave in Final Strikes at moments after you consume Vulnerable/Inflictions to not miss out on the window for activating Ardelia’s combo
- After Corrosion is applied, if Ardelia’s Susceptibility hasn’t been applied yet or has a low duration, apply/re-apply it through her Battle Skill.
- When Ardelia’s Ultimate is available, use it if you require healing. If you’re using a weapon that triggers off of Ultimate use, time it to take advantage of its bonuses. If neither of those applies, either save it or use it for its damage/Stagger.
- Collect Shadows of Mr. Wooly to heal your main operator and or team
Detailed Review
Update History
Patch 1.0
January 21st, 2026
Patch 1.0
Cryo 
Caster 
Electric