Ginkaku's abilities are as follows:
>Miracle: 110 MP, deals damage to a single enemy, increasing damage taken by 21% for 3 turns. High chance to inflict poison, medium chance to inflict Depressed or Exhaustion for two turns. Additionally, 7% increased damage taken for each status effect on the target for two turns.
>Beat: Medium chance to cause Throbbing for 2 turns
>If Ginkaku does not attack, remove all status conditions from Blue allies and removes all increases to damage dealt by all enemies. 100% activation, once per battle.
>Passive 1: Increases resting (sleep status?) resistance for Blue allies and reduces stamina recovery by Red opponents by 25%. Ginkaku takes 15% less damage.
>Passive 2: Decreases Red opponents' status resistance by a small amount. When not knocked down, all Blue allies deal 30% more damage to opponents with status conditions.

Just on a quick glance, the blue-skinned fox is a scary friend in terms of abilities. She has very clear synergy with Blue friends, especially those that inflict status effects. Just one status effect on an enemy means your blue team will lay a vicious smackdown on them. This sounds incredibly good in both PvP and the dojo, where enemies can survive for long periods of time. Mix in some friends of any color that provide status effects and have some strong Blue attackers, and you've got consistently high damage.

I don't know which blue friends inflict status effects, and that'd require a bit of a deep dive to find them. If you know of any off the tops of your heads, post em. Let's put this new horny fox to good use!