Ardelia

early game support

supporthealerdebufferteam_buffer

Ardelia blends healing with enemy debuffing, so she covers two jobs in one slot. She spreads Corrosion and then converts it into Physical and Arts Susceptibility, raising the whole squad's damage, while her talent keeps allies topped up through Shadows of Mr. Dolly. Because she slots into almost any composition, she earns a top-tier placement.

A cheap, Will-focused starting setup. The Mordvolt Resistant set floods Ardelia with Will and a little Intellect, and because her healing formula scales with Will the return on that investment is immediate. The battery piece adds treatment bonus, and the set's treatment spike while she is below half HP gives her a bit of emergency recovery. Either Dreams of the Starry Beach or Freedom to Proselytize can sit in the weapon slot here, with Fluorescent Roc offered as another early-accessible option; move to the endgame Eternal Xiranite configuration once better pieces are available.

Insights

Core Mechanics

Eruption Column is the combo trigger: it fires when the controlled operator lands a Final Strike on an enemy without Vulnerable or Arts Infliction, dropping a homing cloud that applies temporary Corrosion and lowers all elemental resistance.
Dolly Rush eats that Corrosion and replaces it with Physical and Arts Susceptibility; with Mountainpeak Surfer the skill is cast a second time for free while Corrosion is still on the target.
Friendly Presence spawns Shadows of Mr. Dolly when Dolly Rush connects, and Wooly Party sheep can also spawn them. Touching a Shadow heals the controlled operator, or the lowest-HP ally when they are already full.

Scaling

Healing values are driven by Will, so early Will investment pays off immediately and keeps improving as the stat rises.
Her debuff payoff is team-dependent: the susceptibility window only converts into real damage when teammates have cooldowns ready to spend.
At the start she plays as a straightforward healer, while endgame gear shifts her into a multiplier that raises the entire team's damage.

Team Role

Ardelia occupies the sustain-plus-enable slot. She is not a primary damage dealer; instead she keeps the squad healthy while setting up windows where everyone else hits harder. In practice she works in two beats: the on-field character lands a Final Strike so Eruption Column applies Corrosion, then Ardelia uses Dolly Rush to consume it and stamp Physical and Arts Susceptibility onto the target. Allies should spend their burst skills inside that window. Because healing only happens when the controlled operator walks over Shadows of Mr. Dolly, she wants a team that keeps switching and moving rather than one that parks behind a single carry. She pairs naturally with damage dealers who appreciate amplified Arts and Physical damage, and she can also be built purely as a survival anchor when a fight is a war of attrition.

Weapon

dreams_of_the_starry_beachBest

6★ Wand

freedom_to_proselytizeRank 2

5★ Wand

fluorescent_rocRank 3

4★ Wand

Weapon Stat Priority

inflictiontreatment_efficiency_boostintellect_boost

Gear

healing_boost

Pieces

armor

gloves

core 1

core 2

Explanation

Mordvolt Resistant is the easy early set to complete and it feeds the exact stat her healing formula wants, so it outperforms flashier options until better pieces drop.

Freedom to Proselytize adds further Will and lets her treat an additional ally through the weapon effect, which is why it appears in the early game writeup, while Fluorescent Roc is noted as another early-accessible Will option.

Dreams of the Starry Beach remains the eventual upgrade target because it keeps helping after the early game ends.

Notes

Mordvolt Resistant loads Ardelia with Will plus some Intellect, and since her healing scales off Will the bigger stat line directly equals bigger heals.
The battery piece raises treatment bonus, stacking with the set's low-HP treatment effect when she dips below half health.
The source build table lists Dreams of the Starry Beach, while the surrounding text names Freedom to Proselytize for this budget setup, so treat either as usable while you assemble a stronger Arts Unit.