A MECH Lightning

Stalker: Phantom Iron

Rita Rossweisse

TierC
RolesSupport · Debuffer
Release3.0

Stalker: Phantom Iron is Rita's A-rank MECH-type Lightning scythe user from v3.0. Her Ultimate releases Stalker Carbon, a robotic hound whose neurotoxins drive everyone into Psycho: enemies take more damage and lose Ignore Interrupt, while teammates deal more Elemental DMG but also take more damage. She can also play as a Supercharged Lightning DPS. She was never exceptional (Marisa Impact: a situational Memorial Arena buffer for Valkyrie Pledge), and with no Astral Ring she is obsolete in 9.0.

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Stalker: Phantom Iron

Psycho support

Weapons

Genome Reaper BiS
A
Her signature scythe (Marisa Impact, BBS): a Lightning neurotoxin active and Move Speed-based damage. Exchange Shop or Battle Pass.
Phantom Iron's signature scythe: a Lightning neurotoxin active ending in a Toxic Mist blast, +20% Move Speed, and Physical/Elemental DMG that scales with Move Speed buffs (up to +35%).
Undine's Tale
A
BBS support option: a cheap active with a strong Time Slow, which also sets up QTEs.
Cheap-SP active that hits for Physical DMG and applies a strong Time Slow; on Swallowtail Phantasm it also gives 250 Veil in Burst or triggers Warp State.
Carmine Steel
B
BBS transitional pick.
Budget scythe: a healing barrier active that adds 10% Total DMG and 10% Physical DMG while it holds.

Stigmata

Turgenev T Top
Turgenev M Middle
Turgenev B Bottom
Marisa Impact's pick (G3 Turgenev) and the BBS support set: her hound's hits keep the Elemental vulnerability mark up, and summons deal more damage.
Set effects
2pRebel's Gun set. Every 6 hits from the wearer or her summons extend Hunter Mark (applied by the B piece) by 2s, up to 12s; marked enemies take 21% more Elemental DMG.
3pThe wearer's Ultimate and summons deal 25% more Total DMG; while her summons are on the field, the team deals 25% more Ice DMG to marked enemies.
Caravaggio T Top
Caravaggio M Middle
Otto Apocalypse B Bottom
BBS recommendation: Caravaggio's summon-based team Elemental DMG, and Otto's Lightning DMG per summon on the field.
Set effects
2pHits from the wearer's summons give the team stacking Elemental DMG (+5% each, up to 4), then 6s of Natural State with another +20% Elemental DMG.
3p+15% Total DMG Reduction per friendly summon on the field (up to 3 stacks; each hit taken removes one; CD: 10s).
2pAfter 3 Basic ATK hits, the next Charged ATK creates a 4s Punishment Field (summon): enemies inside take 40% more Lightning DMG.
3pEvery 5s, the next Charged ATK brands the target with a Sky Brand that explodes for 80% ATK of Lightning DMG.
Darwin T Top
Darwin M Middle
Darwin B Bottom
BBS transitional Lightning set.
Set effects
2pEntering the field gives +20% Lightning DMG; taking a hit disables it for 10s and inflicts 3 Paralyze Trauma on nearby enemies.
3pLightning DMG +20% and Move Speed +20%; the 2-piece bonus is only disabled after 2 hits.

Stat targets

  • Reach S rank: it unlocks Command: Frenzy (+30% Elemental DMG for Psycho teammates) and Pattern Recognition
  • Keep some SP when you release the hound: it vanishes 3s after your SP hits 0
  • Stigmata affixes: ATK and Lightning DMG

Talent priority

Ultimate
Passive
Evasion
Special ATK
Leader
Basic ATK

Marisa Impact lists Genome Reaper + G3 Turgenev as her gear with a candid "best? I don't even know": she is too outdated for anyone to optimise her today.

Teams

Recommended teams

Part 1 Lightning (on-field)

Stalker: Phantom Iron
Schicksal's Imperative
Golden Diva

Marisa Impact's Part 1 Lightning lineup puts her on the field with Lightning supports such as Schicksal's Imperative and Golden Diva; Psycho buffs their Elemental DMG. Part 1 content only.

Legacy Arena support (Valkyrie Pledge)

Valkyrie Pledge
Stalker: Phantom Iron
Golden Diva

Her historical niche (Marisa Impact): buffing Valkyrie Pledge's Lightning damage in the Memorial Arena, a very situational pick. Golden Diva is a stand-in for the last slot.

Guide

How to play

Load and Supercharged state

  • Charged ATK: Lightning Phantom: at 0 Load, hold [ATK] during her Basic ATKs to shuttle through the target (4 Lightning hits) and enter the Supercharged state: her Basic ATKs deal Lightning DMG, she gains +30% Lightning DMG and 30% Move Speed.
  • Supercharged raises Load by 25/s. At 200 Load she becomes Depleted (slower) until Load drains back to 0. Ultimate Evasions (−30 Load, −150 with Lightning Reflex's upgrade) and kills from S rank bring it down faster.

Evasion: Lightning Reflex

  • Ultimate Evasion zaps the attacker and nearby enemies with Lightning DMG, inflicts Paralyze Trauma and lowers Load (CD 15s, 11s from SS); tap [ATK] right after to continue from Basic ATK SEQ 4.

Ultimate: Stalker Carbon

  • For at least 35 SP (CD 18s), she releases the Carbon-based Hunter (summon, up to 24s). Its neurotoxins inflict Psycho:
  • Enemies deal 10% more Elemental DMG, take 10% more Total DMG and lose Ignore Interrupt.
  • Teammates (not Phantom Iron) deal 15% more Elemental DMG (30% from S rank) but take more damage, and gain Ignore Interrupt.
  • While the hound is out, her SP drains and her attacks restore 50% less SP; at 0 SP it leaves within 3s. She gains +60% Total DMG while it is active.

QTE

  • Mental Torrent triggers on Time-Slowed enemies: a large AoE that knocks enemies airborne and inflicts 10 Paralyze Trauma, then chains into Basic ATK SEQ 5.

How to use her

  • As a support: swap in, cast Stalker Carbon so the neurotoxins reach enemies and your Lightning DPS, then swap out while the hound works. Mind the extra damage your team takes from Psycho.
  • As a DPS: Charged ATK into Supercharged, Basic ATK strings, Lightning Reflex to reset Load, Ultimate for the +60% Total DMG window.

Her leader skill cuts team Elemental DMG taken by 30% and gives MECH-type battlesuits +21% Total DMG on Basic, Charged and Combo ATKs (S rank).

Strengths

  • Easy to get: Open World, Expedition, Dorm Supply, Dorm Shop and Elysian Shop (Marisa Impact).
  • Psycho is both a buff and a debuff: more Elemental DMG for the team, more damage taken and no Ignore Interrupt for enemies.
  • Lots of Paralyze Trauma from her QTE and Lightning Reflex.
  • Can double as a Supercharged Lightning DPS.

Weaknesses

  • Obsolete in 9.0: no Astral Ring, no Elysian Realm slot, and she was never more than situational (Marisa Impact).
  • Psycho makes your own teammates take more damage (+30% from S rank).
  • Her hound drains her SP and halves her SP recovery.
  • Load management makes her DPS mode clunky.

Notable dupes · Rank

S
Big upgrade

Her whole support kit: Command: Frenzy (Psycho teammates get +30% Elemental DMG), Command: Kill (+50% hound Lightning DMG), Pattern Recognition (team +15% Elemental DMG against shielded enemies), faster Load reset and a stronger leader skill.

SS
Solid upgrade

+20% Total DMG against Paralyzed or Ignited enemies, and Lightning Reflex CD −4s.

SSS
Optional

Supercharged: Ignore Interrupt, bonus Lightning DMG and Paralyze Trauma on Basic ATKs, and 30% less damage taken.

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Updated September 26, 2026 · Version 9.0
Sources & references
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