──Edith.さんのイラストまとめ

[...A centaur-like being was summoned?]

I—no, we—are Floribunda. Our form was created for and out of conflict, we shall try our best in battle if you desire our power.

「🦅」Plume (Griffin):
A polite butler directly serving the Queen of Hearts, known as Plume, the Griffin. Reserved, a person of few words and little information behind them.

Not many know for sure why they hold the card of Griffin, given they show no evident traits of the card.