Ruby

ルビー

Ruby is Meimi's pet hedgehog. Her manga debut occurs midway through the story, whereas she appears quite early in the anime series. A man purchased her and forced her to swallow a gem. Saint Tail then stole Ruby from the man to protect the gem inside her. Ruby also knows that Meimi is Saint Tail and has even joined her on a previous caper, although Meimi must keep Ruby hidden from Asuka Jr. so he does not recognize her from that earlier adventure.