Arknights Endfield Ardelia Build & Analysis

Ardelia is a 6★ Support in Arknights Endfield built around three practical outputs: reliable HP Treatment, Nature-based pressure through Corrosion, and team-wide damage scaling through Susceptibility. She is also one of the easiest “plug into any roster” supports early on because her debuffs benefit both Physical and Arts damage.

If you are comparing Ardelia to other operators or trying to understand where she stands in the broader meta, this article is written to slot directly into our Arknights Endfield Tier List, where all characters are evaluated under the same conditions and assumptions.

Basic Information

Weapon: Arts Unit
Role: Support
Element: Nature
Rarity: 6★
Main Attribute: Intellect
Secondary Attribute: Will

Base Stats

Stat	Base	Max
HP	500	5495
ATK	30	323
DEF	0	0
Strength	9	112
Agility	9	93
Intellect	20	145
Will	15	118

Skills

Basic Attack — Rocky Whispers

Up to 4 attack sequences dealing Nature DMG
Final Strike deals 18 Stagger when Ardelia is the controlled operator
Mid-air basic attacks become Dive Attacks, dealing Nature DMG in an area
Attacking a Staggered enemy triggers a Finisher, dealing heavy Nature DMG and restoring SP

Battle Skill — Dolly Rush

Rams the target to deal Nature DMG
If the target has Corrosion: consumes Corrosion and applies Physical Susceptibility and Arts Susceptibility to the target

Combo Skill — Eruption Column

Trigger

When the controlled operator performs a Final Strike on an enemy with no stacks of Vulnerability or Arts Infliction

Effect

Launches a homing Volcanic Cloud that deals Nature DMG when it reaches the target
Explodes after a short delay, dealing half the Nature DMG and forcibly applying temporary Corrosion to nearby enemies

Ultimate — Wooly Party

Enters a mobile channeling state and throws multiple copies of Mr. Dolly in random directions
Each copy deals Nature DMG
Each enemy can only take 1 damaging hit every 0.3s

Talents

Friendly Presence

Base: Dolly Rush creates 3 Shadows of Mr. Dolly after hitting. Wooly Party copies have a 10% chance to create Shadows when they fall. Touching a Shadow restores HP: [45 + Will×0.38]. If controlled operator is at max HP, heals the teammate with the lowest % HP. Shadows last 10s; up to 10 can exist.
Promotion I: HP restored becomes [63 + Will×0.53]. Same Shadow rules.
Promotion II: HP restored becomes [90 + Will×0.75]. Same Shadow rules.

Mountainpeak Surfer

Promotion II: Dolly Rush improved — if an enemy with Corrosion is nearby, triggering the additional effect immediately casts Dolly Rush again (once per active cast)

Potentials

Potential I: Dolly Rush improved — consuming Corrosion applies Physical Susceptibility and Arts Susceptibility with effects +8%
Potential II: Friendly Presence improved — touching a Shadow also treats another allied operator with the lowest % HP for half the treatment
Potential III: Wooly Party improved — duration +1s; Shadow creation chance increased to 1.2×
Potential IV: Wooly Party improved — Ultimate Energy cost −15%
Potential V: Eruption Column improved — cooldown −2s; DMG multiplier 1.2×; Corrosion duration +4s

Promotions, Materials, and Bonuses

Promotion Materials

Promotion I

Protodisk ×8
Pink Bolete ×3
T-Creds ×1600

Promotion II

Protodisk ×25
Red Bolete ×5
T-Creds ×6500

Promotion III

Protoset ×40
Ruby Bolete ×5
T-Creds ×25000

Promotion IV

Protoset ×75
Quadrant Fitting Fluid ×56
Cosmagaric ×8
T-Creds ×225000

Attribute Bonuses

Promotion I: Intellect +10
Promotion II: Intellect +15
Promotion III: Intellect +15
Promotion IV: Intellect +20

AIC Skills

Promotion I: Reception Room clue collecting efficiency +20%
Promotion II: Reception Room Mood Drop −14%
Promotion III: Reception Room clue collecting efficiency +30%
Promotion IV: Reception Room Mood Drop −18%

Analysis & Verdict

Ardelia’s kit is built around one very practical thing: making whatever team you’re running hit harder while staying alive. Eruption Column forcibly applies Corrosion in an area, and Dolly Rush turns that Corrosion into double Susceptibility — Physical Susceptibility for weapon damage teams and Arts Susceptibility for elemental/Arts-focused teams. That dual coverage is why she’s considered “universal” early on: you don’t need to know your final comp to get value from her.

Her healing is also not “press heal.” Friendly Presence creates Shadows of Mr. Dolly and the heal happens when the controlled operator touches one. That changes how fights look: you can keep moving, keep rotating, and the sustain comes from pathing through the shadows. If you are already full HP, the heal redirects to the teammate with the lowest percentage HP, which prevents the common support problem of wasting a heal on the wrong target.

Wooly Party adds wide Nature coverage without needing target selection. The random throws are not about precision; they are about flooding the fight with hits on a 0.3s per-enemy limit, which keeps the damage stable in messy waves and multi-target situations.

The main “condition” in her kit is Corrosion management. You want Corrosion present so Dolly Rush can consume it and apply Susceptibility. Potentials push that harder: higher Susceptibility effects, longer Corrosion duration, shorter cooldowns, and extra healing distribution.

Ardelia’s role in most rosters ends up being simple: she raises the team’s damage floor, patches survivability through movement-based healing, and enables both Physical and Arts comps with the same button set. If you have a flex slot and don’t want to think too hard, she is usually the correct answer.

Ardelia Build

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Ardelia Teams