I play mainly play the English ver. and somehow have too many Kaoru Cards...

My favorites from other series:

Enstars: Eichi, Rei, Natsume, Kohaku, HiMERU, Izumi

A3!: Hisoka & Omi

Hypmic: Ichiro, Jyuto, Gentaro, Doppo (all of the characters really)

Utapri: Ai Mikaze & Masato