Ken-Ohki is Nagi's cabbit partner.

Like Ryo-Ohki, Ken-Ohki can transform himself in a space battleship, although the configuration and color is slightly different than Ryo-Ohki. And like Ryo-Ohki, Ken-Ohki has developed a love of carrots.

Ken-Ohki and Ryo-Ohki also love each other, which complicates Nagi's almost obsessive quest to capture Ryouko. But this love had also saved Nagi from being killed by Ryouko.