Aero Erosion Team Guide: Cartethyia, Ciaccona & Rover

Aero Erosion is one of the Negative Statuses that define the 3.x combat meta, alongside effects like Spectro Frazzle and Glacio Chafe. Instead of a single application, Erosion stacks on an enemy as Aero attacks land, and each stack raises how much damage subsequent Aero hits deal to that target.

• Erosion needs an applicator to build stacks quickly and reliably before the payoff hits.
• The payoff DPS is the character whose own kit scales the hardest off having a heavily-stacked target to hit.
• A dedicated support that also contributes Erosion stacks lets the applicator focus more on their own damage instead of upkeep.

Verdict: treat Aero Erosion as a three-role team shape — applicator, payoff DPS, and a stack-contributing support — not a single character's gimmick.

The Aero Erosion core is three characters with distinct jobs: an applicator to stack the status, a support to raise its cap, and a payoff DPS to cash the stacks in. This table shows each one's tier, signature weapon and best Echo set.

Character	Role & tier	Signature weapon	Best Echo set	Job in the Aero Erosion team
Cartethyia	Main-DPS · S	Defier's Thorn	Windward Pilgrimage (5-pc)	Payoff DPS — spends accumulated Aero Erosion stacks for burst damage.
Ciaccona	Sub-DPS · S	Woodland Aria	Gusts of Welkin (5-pc)	Applicator — builds Aero Erosion stacks from off-field.
Rover: Aero	Support · A (free)	Bloodpact's Pledge	Windward Pilgrimage (5-pc)	Free support — Outro raises the stack cap above 3.

Before the team breakdowns, here is the raw Aero Erosion mechanic, cross-checked across independent sources. The detail most guides miss is the stack cap and who can push past it.

That base cap of 3 is exactly why Aero Rover matters so much to this archetype: its Outro is the one tool that lifts the ceiling, letting a payoff DPS like Cartethyia cash in far more stacks than an Aero team could reach on its own.

Cartethyia sits at S tier as a main-DPS, and she's built to be the character that cashes in a stacked Erosion target. Her own kit self-applies some Erosion, so she can function without a dedicated applicator, but her ceiling is set by how much stacking support she gets around her.

• Rated among the best Aero main-DPS options in the game, with huge damage once her rotation is fully invested.
• Held back by long rotations and high investment needs — she is not a quick, low-commitment pick.
• Signature weapon: Defier's Thorn.
• Best Echo set: Windward Pilgrimage at 5 pieces.

Verdict: Cartethyia rewards full investment far more than most main-DPS — she is much stronger paired with Ciaccona and her signature weapon than run alone.

Ciaccona is an S-tier sub-DPS and the applicator half of this archetype. Her kit is built to apply both Aero Erosion and Spectro Frazzle onto enemies, which is unusual — most buffer-debuffers only touch one Negative Status.

• Dual-status application means she has value even outside a pure Erosion team, in any comp that wants Spectro Frazzle stacked too.
• Her kit is described as blooming fully only when paired with Cartethyia specifically — she is built around that synergy.
• Signature weapon: Woodland Aria.
• Best Echo set: Gusts of Welkin at 5 pieces.

Verdict: pull Ciaccona for the Erosion stacking itself, not as a generic sub-DPS — her ceiling is tied directly to running alongside Cartethyia.

Two numbers decide how fast Aero Erosion builds and how high it can go. Cartethyia's kit is the reference case: her 4th Normal Attack hit applies 1 stack, and her Resonance Skill applies 2 stacks per hit. The stack count is capped at 3 by default — only Aero Rover's Outro Skill raises that ceiling to 6.

Trigger	Effect
Base stack cap	3
Stack cap with Aero Rover's Outro Skill	6

The DoT itself ignores ATK entirely: its damage is set by the afflicted character's level plus the enemy's DEF/RES and the current stack count, and it does not scale with Crit Rate, Crit DMG or damage buffs.

The Aero form of Rover is rated A tier as a support, and the key detail is that Rover is a free, playable character from the start of the account — no gacha pull required to slot the archetype's best-in-slot support role.

• Called a top applicator for the archetype, contributing Aero Erosion stacks alongside Ciaccona.
• The one real limiter is the archetype itself: the pool of units built to punish Negative Statuses is still small, capping how far a pure support-applicator can flex outside this team.
• Signature weapon: Bloodpact's Pledge.
• Best Echo set: Windward Pilgrimage at 5 pieces — same set as Cartethyia.

Verdict: Rover-Aero is the rare case of a completely free unit sitting best-in-slot in an S-tier team, which makes this archetype cheap to start even before pulling Cartethyia or Ciaccona.

The Cartethyia Erosion team runs two different 5-piece Echo sets depending on role, which is worth planning your farming around before you commit Tuners.

• Windward Pilgrimage (5 pieces) — the set for both Cartethyia and Rover-Aero, tying the payoff DPS and the free support to the same farm target.
• Gusts of Welkin (5 pieces) — the dedicated set for Ciaccona, separate from what her two teammates want.
• Every Echo carries a cost of 4, 3, or 1, and a full 5-Echo loadout is built around that cost budget rather than picking five 4-cost pieces.

Verdict: farm Windward Pilgrimage first if you're building Cartethyia and Rover-Aero together, then dedicate a separate Gusts of Welkin set once Ciaccona joins the team.

Not every strong Aero team is built around Erosion. Sigrika sits at SS tier as a main-DPS in a completely different Aero branch: the Echo Skill DMG archetype, where damage scales off Echo Skill multipliers instead of a stacking Negative Status.

• Sigrika is rated a hypercarry, with multipliers among the highest in the game, plus strong crowd control that helps in Whimpering Wastes.
• Her team, Sigrika Aero Echo, pairs her with Qiuyuan and Shorekeeper to stack full Aero and Echo Skill buffs at once.
• Signature weapon: Solsworn Ciphers. Best Echo set: Sound of True Name at 5 pieces — a different set entirely from the Erosion team's picks.

Verdict: don't mix these two Aero branches — Sigrika's Echo Skill team and the Cartethyia Erosion team want different characters, different Echo sets, and different playstyles, even though both are labeled Aero teams.

Both branches are rated at the top of the Aero element, so the right pick comes down to what you already own and how you like to play, not one being strictly better.

• Pick the Cartethyia Erosion team (Cartethyia + Ciaccona + Rover-Aero) if you want a stacking-DoT playstyle and already have — or plan to pull — both Cartethyia and Ciaccona, since Rover-Aero is free either way.
• Pick the Sigrika Aero Echo team (Sigrika + Qiuyuan + Shorekeeper) if you want a hypercarry burst playstyle with strong crowd control for multi-wave content.
• If you only have Rover-Aero so far, she still slots into a free-leaning Aero core while you decide which limited unit to chase next.

Verdict: Rover-Aero is the safe first step into Aero either way — build her, then commit your pulls toward Cartethyia-Ciaccona or Sigrika depending on whether you prefer sustained stacking damage or hypercarry burst.