Koyori Assistants

Stack Koyori's Assistants on one 2nd Koyori and let her reveal holomem for 120 + 20 each.

A+Tier
85.4%Win rate vs the field
#14 of 49JP ranking
JPCard pool
CRound robin tier: 49.2% head-to-head, #26 of 49

How the deck wins

2nd Koyori hEB01-024 reveals cards equal to the cheers on your stage and gets +20 and heals 20 for each holomem revealed. The deck is mostly holomem, so most reveals hit.

Koyori's Assistants can stack any number on Koyori and each one moves a cheer to her. The oshi's stage skill reveals 1 more card per Assistant on stage.

The 2-power oshi skill gives every Koyori Arts+30 when 3+ holomem show up, and adds the revealed non-Debut holomem to your hand.

Deck list

Tap any card to see it full size.

Oshi and holomem (38)
Support (12)
Cheer deck (20)
QtyCardTypeCard no.
1Hakui KoyoriOshihEB01-003
6Hakui KoyoriDebuthBP04-008
4Hakui KoyoriDebuthEB01-018
4Hakui KoyoriDebuthEB01-019
4Takane LuiDebuthBP08-062
4Hakui Koyori1sthBP04-012
3Hakui Koyori1sthEB01-020
3Hakui Koyori1sthEB01-022
2Takane Lui1sthBP01-060
1Takane Lui1sthBP08-063
1Hakui Koyori2ndhEB01-023
4Hakui Koyori2ndhEB01-024
2Takane Lui2ndhBP01-061
4holoANStaffhSD14-010
4Watermelon BubbleEventhBP09-098
4Koyori's AssistantsFanhBP04-105
1White CheerCheerhY01-006
19Yellow CheerCheerhY06-005

Matchups (round robin)

In the JP round robin, each of the 49 JP specialist AIs played every other one 400 times, half going first. This deck won 49.2% of those games: tier C, #26 of 49. It won 23 of its 48 matchups (15 below 40%). These are AI-vs-AI results, not tournament data.

Best matchups

  1. Kobo Rainout91.5%
  2. Roboco-oshi Koyori Loop87.5%
  3. Risu ID Family79.8%
  4. Kobo-oshi Moona Screenshot76.5%
  5. Hajime Banchou74.8%

Toughest matchups

  1. Mio-oshi Baelz Elizabeth2.2%In its wins, Mio-oshi Baelz Elizabeth attacks with "It's not fun without you" from 1st Hakos Baelz (hBP07-045) 4.9 times a game, and downs 4.7 holomems a game. When Koyori Assistants wins, it downs 3.0 holomems a game (vs 0.7 in its losses) and attacks with "A Special Time Nobody Else Knows About...♡" from 2nd Hakui Koyori (hEB01-024) more often (3.4 vs 1.2 times a game).
  2. AZKi Frontier12.8%In its wins, AZKi Frontier attacks with "The trajectory we spun - a song dedicated to all" from 2nd AZKi (hBP07-069) 3.1 times a game, and attacks with "A space that is close to you" from Debut AZKi (hBP07-063) 1.2 times a game, and downs 4.7 holomems a game. When Koyori Assistants wins, it downs 4.7 holomems a game (vs 2.1 in its losses) and attacks with "A Special Time Nobody Else Knows About...♡" from 2nd Hakui Koyori (hEB01-024) more often (4.8 vs 2.3 times a game).
  3. Nene Energy Drink16.2%
  4. Subaru Oozora Police24.5%
  5. Kaela Master Forge24.8%

vs Mio-oshi Baelz Elizabeth

2.2%

2% going first, 2% going second. Games last 11.0 turns on average (400 games).

Most wins come from taking the opponent's last life card (100% of wins). In a loss, the opponent usually takes its last life card (85% of losses).

In its wins, Mio-oshi Baelz Elizabeth attacks with "It's not fun without you" from 1st Hakos Baelz (hBP07-045) 4.9 times a game, and downs 4.7 holomems a game. When Koyori Assistants wins, it downs 3.0 holomems a game (vs 0.7 in its losses) and attacks with "A Special Time Nobody Else Knows About...♡" from 2nd Hakui Koyori (hEB01-024) more often (3.4 vs 1.2 times a game).

Key cards

2nd Koyori hEB01-024 (main attacker)

A Special Time Nobody Else Knows About: 120, reveal cards equal to cheers on stage; +20 and heal 20 per holomem revealed.

Your finisher. More cheers on stage means bigger hits.

Hakui Koyori (oshi)

Stage: reveal +1 card per Koyori's Assistants on stage. 2 power: reveal cards equal to cheers; with 3+ holomem, Koyori get Arts+30 and you take the holomem.

Use the 2-power skill on your big attack turn.

Koyori's Assistants

Attach only to Koyori, any number; when attached, move a cheer from your stage to her.

Play them early; the trained AI attaches 2 on turns 1-2.

1st Koyori hBP04-012

Bloom: search a #KOYO LABO support (like Koyori's Assistants).

Bloom it first to find Assistants.

1st Koyori hEB01-022

Bloom: return 1-2 Koyori's Assistants from the archive.

Gets Assistants back after a knockout.

Debut Koyori hEB01-019

Collab: going second on turn 1, take a Debut and a #KOYO LABO support.

Your turn-1 collab when going second.

Game plan

Turns 1–2

Early game

Get Assistants on stage right away.

  1. Attach Koyori's Assistants to your Koyori from turn 1.
  2. Play holoAN and Watermelon Bubble to dig.
  3. Bloom 1st hBP04-012 to search more Assistants.
Turns 3–4

Mid game

Bloom 2nd hEB01-024 in the center.

  1. Bloom the 2nd around your 3rd turn.
  2. Keep stacking Assistants on her: more cheers and bigger reveals.
  3. Leave the Lui cards as support; don't attack with them.
Turn 5 on

Late game

Big reveals every turn.

  1. Attack with hEB01-024 every turn; she also heals your stage.
  2. Use the oshi skill for Arts+30 when you need a knockout.
  3. Recover Assistants with 1st hEB01-022.

What the trained AI does

In 60 test games the trained AI won 88%, against 57% for the general AI playing the same deck. It finished games in about 8 of its own turns.

Habit (per game)Trained AIGeneral AIWhat it means for you
2nd hEB01-024 damage1102837Put everything into one 2nd Koyori.
Assistants played on turns 1-22.1—Start stacking Assistants on turn 1.
2nd hEB01-023 damage538hEB01-023 is for draw, not attacking.
Debut Lui Arts used0.21.1Use Lui for setup, not attacks.
Your holomem downed1.53.0Healing reveals keep your stage alive.

Practice it

  1. In Match Lab's Player vs Bot, play against the Koyori Assistants (JP) Specialist AI first and watch how it sets up.
  2. Then pilot the deck yourself against the Generalist AI.
  3. Aim to win in about 8 of your own turns, like the trained AI does.

Last updated 2026-11-11.