Touya and Minori and the rest of the players in the training camp are hitting a wall with the way they fight.  And Minori's suggestion is that they introduce themselves to one another!
We already did that.
Das haben wir schon getan.
Ya lo hicimos.
On l’a déjà fait, non ?
L'abbiamo già fatto.
Já fizemos isso.
Мы не первый день знакомы.