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Raiden Mei (APHO)

Last updated 2026-08-04

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Mei (APHO)

Raiden Mei is a playable character in A Post-Honkai Odyssey. She was previously the 3rd Herrscher, and is now the current "Schicksal" Captain of Anti-Honkai Squad No.3.

While traveling around the world to clear out the residual Honkai, Mei is waiting for the reunion with an important one.

Raiden Mei is character who uses a sword, giving exceeding Attack Speed as well as strong air combat performance. However, this can make her lack Shield Break Damage. Raiden Mei will always deal Lightning Damage, which can ignore Physical Damage Reduction.

An agile melee fighter who wields a katana with fast Attack Speed and long hang time, effective against minor or aerial enemies.
Deals primarily Lightning DMG and builds up Paralyze Trauma that immobilizes enemies for 3s when fully charged.
Certain skills can also Thundertrap and immobilize enemies.

— In-game description

Unknown Sword

Raiden Mei in action

Raiden Mei in action

Unknown Sword

Unknown Sword

A sword with traditional patterns, however, the blade of this sword has a black/red color.

Seems to be lightweight sword that gives Mei very fast attack speed.

Skills

Skills require Regulator (Mei) (Small) Regulator (Mei) to be upgraded. Any numbers shown are for MAX level skills.

Talent Branch A

The Basic ATK branch is on the top, including Basic ATK, Joint ATK and aerial enhancements.

Joint ATKs have a higher number of attacks, which can quickly increase the number of consecutive attacks. Aerial enhancements can greatly increase the output ability of the character in the air.

Talent Module A
PHO Mei Normal Attack Basic ATK - Passive (always on)

Ground Basic ATK: 4 slashes dealing 80% + 80% + 60% + 60% + 60% + 80% + 120% ATK of Lightning DMG and knocking enemies airborne (50% if knocking enemies into a wall).
Aerial basic ATK: 4 slashes & upper slash dealing 80% + 80% + 70% + 70% + 70% + 60% x 6 ATK of Lighting DMG and knocking enemies airborne.
Attacking from behind grants 10% bonus total DMG for 6s.

Branch (Right)
PHO Mei Normal Attack 1 Achilles' Blessing - Ability (activation required)
βMinor Core Implant

Each second of hang time grants 4% bonus total DMG (80% max) while in the air.

PHO Mei Normal Attack 2 Achilles' Bathing - Passive (always on)

Taking down enemies midair grants 6s of Iron Body and 200 KE.

Branch (Left)
PHO Joint Attack 1 Joint ATK - Passive (always on)

Switched in (at the end of main character's ground Basic ATK):
Main character shifts behind the enemy dealing 100% ATK of Physical DMG meanwhile Mei leaps before the enemy. The two perform combo slashes simultaneously dealing 55% x 2 ATK of Physical DMG plus 20% x 12 ATK of Lightning DMG. Mei's last sweep slash deals 150% ATK of Lightning DMG and knocks enemies airborne.
Tap [ATK] repeatedly for up to 1x more combo slashes.

Switched in (at the end of Carole's ground Basic ATK):
Carole knocks down enemies dealing 200% ATK of Physical DMG, followed by Mei launching swirling slashes dealing 30% x 6 ATK of Lightning DMG and knocking enemies airborne to deal 100% + 60% x 4 ATK of Lightning DMG.
Tap [ATK] repeatedly for up to 1x more swirling slashes.

PHO Joint Attack 2 Joint ATK EX - Passive (always on)

Evading during ground Basic ATK does not break the sequence.

Talent Branch B

The Special ATK branch is on the left, including Special ATK, QTE, and Skill Rating bonuses.

At high Skill Rating, the whole team can gain damage boosts from high combo hits.

Talent Module B
PHO Mei Special Attack Special ATK - Passive (always on)

When on the ground, perform an upper slash to deal 100% ATK of Lightning DMG and knock enemies airborne.
When airborne, perform One Flash to deal 250% ATK of Lightning DMG and shift behind the enemy.
One Flash costs 100 KE which regenerates over time and through successful hits on the ground (300 max).
KE auto-recovers to 100 upon landing.

Branch (Top)
PHO Mei Special Attack 1 Icarus' Resolve - Ability (activation required)
γ Minor Core Implant

KE auto-recovers to 300 upon landing (cannot exceed limit).

Branch (Middle)
PHO Mei Special Attack 2 Icarus' Ascent - Passive (always on)

At S Skill Rating or higher, character deals combo hits x 0.08% bonus total DMG (200 combo hits max).
Combo hits will not break from the 1st Interruption (shared across team). CD: 40s.

PHO Mei Special Attack 3 Icarus' Sunblaze - Ability (activation required)
γ Minor Core Implant

At S Skill Rating or higher, other characters also deal combo hits x 0.08% bonus total DMG (200 combo hits max).

PHO Mei Special Attack 4 Icarus' Ambition - Passive (always on)

At SS Skill Rating or higher, max combo hits for the Skill Rating buff rise to 240.
At SSS Skill Rating, max comb hits for the Skill Rating buff rise to 280.

Branch (Bottom)
PHO Mei Special Attack 5 QTE: Thunder Roll - Passive (always on)

Triggered by enemies blown airborne to launch shuttle attacks dealing 35% x 17 + 150% ATK of Lightning DMG.
Recovers 100 ΚΕ.

PHO Mei Special Attack 6 Icarus' Feather Flurry - Ability (activation required)
βMinor Core Implant

Tap [ATK] repeatedly during QTE to stack sequences. The last sequence deals combo hits x 1.2% bonus total DMG (300 combo hits max).

PHO Mei Special Attack 7 Icarus' Melted Wax - Passive (always on)

Ignited enemies also trigger QTE.

Talent Branch C

The Evasion & Leap branch is on the bottom, including Ultimate Evasion, Evasion Counter, Ultimate Leap, and Leap Counter.

Ultimate Evasion and Ultimate Leap Counter can Paralyze or Thundertrap enemies more easily.

Talent Module C
PHO Evade Jump Evasion / Leap - Passive (always on)

Evade on the ground or in the air. Restores 3 SP for the team and 50 KE for self upon Ultimate Evasion.
Perform up to two leaps from the ground. Restores 3% HP for the team and 50 KE for self upon Ultimate Leap.

Branch (Left)
PHO Evade 1 Evasion Counter - Passive (always on)

Perform One Flash counterattack upon Ultimate Evasion to deal 200% + 80% x 4 ATK of Lightning DMG during blade withdrawal.

PHO Evade 3 Joint Counter - Passive (always on)

Triggers Joint ATK after Ultimate Evasion Counter on the ground.

Branch (Middle)
PHO Mei Evade Core Atalanta's Hunt - Ability (activation required)
βMinor Core Implant

Generates electric beads circling around self after Ultimate Evasion, building up Paralyze Trauma on enemies nearby for 8s. Triggering it again resets the duration.

PHO Jump 3 Leap EX - Passive (always on)

Thundertraps enemies after Ultimate Leap Counter to Immobilize them for 6s.

Branch (Right)
PHO Jump 1 Leap Counter - Passive (always on)

Perform One Flash counterattack upon Ultimate Leap (triggered by special enemy attacks) to deal 400% + 50% x 6 ATK of Lightning DMG.

PHO Jump 2 Perfect Counter - Passive (always on)

Triggers Perfect Ultimate Leap Counter (by tapping when the light circle aligns with the button) and boosts total DMG of counterattacks by 200%.

Talent Branch D

The Ultimate branch is on the right, including two Ultimates and Paralyze / Thundertrap skills.

Spectral Spin summons shadow clones to deal tons of damage.

Thunderwings can stack combo hits at lightning speed and apply crowd control.

Talent Module D
PHO Mei Ultimate 1 Penelope's Spectral Spin - Ultimate (activation required)
α Prime Core Implant

Consume 100 SP to leap up and summon 4 clones which performs an One Flash each (and then vanish) followed by a self-performed One Flash, dealing 100% x 4 + 480% ATK of Lightning DMG.
And summon a shadow afterwards that has 70% of self ATK and mirrors most attacks by self for 15s. CD: 30s.

Branch (Top)
N/A Penelope's Fidelity - Passive (always on)

When on standby, the shadow's duration timer is slowed by 90%.

N/A Penelope's Return - Passive (always on)

1 additional shadow.

Branch (Middle)
PHO Mei Ultimate 3 Penelope's Poise - Passive (always on)

All attacks build up enemy Paralyze Trauma.

PHO Mei Ultimate 3 Upgrade 1 Medea's Magic - Passive (always on)

When removed, Thundertrap will cause a thunder explosion dealing Lightning DMG to enemies nearby.
Thunder explosion's damage and impact radius are based on the Thundertrapped enemy's size (400% for small enemies and 800% for large enemies).

PHO Mei Ultimate 3 Upgrade 2 Medea's Dress - Ability (activation required)
γ Minor Core Implant

Team deals 40% bonus total DMG against Paralyzed or Thundertrapped enemies.

Branch (Bottom)
PHO Mei Ultimate 2 Medea's Thunderwings - Ultimate (activation required)
α Prime Core Implant

Consume 50 SP and summon a thunderbird to strike enemies, dealing 10% x 50 ATK of Lightning DMG and Thundertrapping enemies for 3s. CD: 15s.

PHO Mei Ultimate 2 Upgrade 1 Medea's Thunderclap - Passive (always on)

Boosts the duration of Thundertrap from Thunderwings to 6s.

PHO Mei Ultimate 2 Upgrade 2 Medea's Malice - Passive (always on)

For every 50 combo hits, thunderbird's single attack DMG multiplier increases by 1.6% (caps at 300 combo hits).

Notes

References