The assigned combatant's HP and healing are increased by 8(12)%.
At the start of the turn, gain [Ponopoko's Cheer] equal to the number of enemies with attack intentions.
[Ponopoko's Cheer]: Incoming Damage is reduced by 10(20)%. Upon activation, remove Ponopoko's Cheer (stacks up to 3 times).
Pokopo ponpon! (3 EP):
Heal 200%. Apply 1 Damage Reduction.
Best Overall. Provides 20% Damage Reduction (per intent). For a 300 HP support, flat reduction is the only way to survive high-damage boss turns. It also boosts Rei's Material Regeneration healing by a final 12%, maximizing her sustain.
2) 4★ Arwen (ME0)
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The assigned combatant's HP and healing are increased by 8(12)%.
At the start of the turn, gain [Ponopoko's Cheer] equal to the number of enemies with attack intentions.
[Ponopoko's Cheer]: Incoming Damage is reduced by 10(20)%. Upon activation, remove Ponopoko's Cheer (stacks up to 3 times).
Pokopo ponpon! (3 EP):
Heal 200%. Apply 1 Damage Reduction.
High Survival. A budget version of the ME4, offering 10% reduction. Even at a lower percentage, Damage Reduction is mathematically superior to Defense stats due to Rei's low HP and the 50% "Additional DEF" penalty.
3) 5★ Nyx (ME0)
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The assigned combatant's HP and healing are increased by 8(16)%.
When the assigned combatant Draws for the first time each turn using an ability, +8(16)% Damage dealt by allies for 1 turn.
Errante Hurricane(4 EP):
Discard up to 3 cards, then Draw +1 cards equal to the number discarded.
Tactical Burst. While Snack Time is 1-use, this partner adds +8% Ally Damage during that specific thinning turn. It also provides a passive 8% HP and Healing boost, which is useful for the entire 10-turn battle. Nyx provides more value when Snack Time is replicated or neutral cards like Gear Bag or Rally are used.
4) 4★ Alyssa (ME4)
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The assigned combatant's Defense is increased by 12(24)%.
At the end of battle, recover 3(6)% Health.
Vitality Boosting Potion(2 EP):
Heal 100%. When in an Injured state, increase Healing Amount by 50%.1 Morale for 1 turn.
Stat Stick. Provides a 24% DEF boost. While "Additional DEF" is only 50% efficient in the heal/shield formula, this remains a permanent passive buff that slightly strengthens Rei’s Material Regeneration without conditional triggers.
5) 4★ Alyssa (ME0)
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The assigned combatant's Defense is increased by 12(24)%.
At the end of battle, recover 3(6)% Health.
Vitality Boosting Potion(2 EP):
Heal 100%. When in an Injured state, increase Healing Amount by 50%.1 Morale for 1 turn.
Low Impact. The 12% DEF increase is too small to significantly move the needle for Rei’s survivability or healing output given the defense calculation penalties.
6) 3★ Yvonne (ME4)
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The assigned combatant's Defense is increased by 8(16)%.
If the combatant ends the turn without using an attack card, Heal 30(60)% at the start of the next turn.
Consecration (2 EP):
Heal 100%. For 1 turn, gain 1 Fortitude.
Restrictive Sustain. The 60% Heal is large, but the condition is terrible for Rei. To trigger it, she cannot use her Ego Skill (Final Shadow) and buffed basic attacks, meaning she loses out on her high single-target damage.
7) 5★ Noel (ME0)
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Increase Damage, Shield Gain, and Heal Amounts of the assigned Combatants Retain Cards by 15(30)%.
At the end of the turn, deal Fixed Damage to all enemies equal to 15(30)% for each Retained card of the assigned combatant.
+5% Damage for enemies with the Instinct attribute.
Legato of Faith(3 EP):
Heal 100%. Activate the Retain effect of all cards held by the assigned combatant.
Useless. Since Rei has 0 Retain cards, this partner’s primary buffs and Fixed Damage mechanics simply never trigger. The only benefit is a niche +5% DMG against Instinct enemies, making it the worst choice for her kit.