[@Vocab]They're soldiers for hire, with a good number of Espers and Mages in their group. If Koko fought against them in any battle, then he wouldn't have met Aiden, otherwise he'd be dead as hell. If he fought with him, he wouldn't recognize Aiden due to his other persona, The Hand, wearing a mask and a full body suit to hide his appearance, as well as a voice modulator to make double sure he doesn't get recognized. Aside from that, their interactions would've been few and far between, as Aiden simply pops in when a mission seems to need his special touch, blow the shot out of the enemy, then go on his merry way back to whatever movie set he was working on previously.