Ruby is Meimi's pet Hedgehog. Her manga introduction is half way through the story, while her anime appearance is quite early in the series. She was bought by a man who forced her to swallow a gem. Saint Tail then steals Ruby from the man to protect the gem inside of her. Ruby also knows Meimi is Saint Tail, and has even been on a previous caper with her, although Meimi has to keep Ruby hidden from Asuka Jr. so he won't recognize her from the previous caper she was in. 

Meimi Haneoka, 14, is a normal girl during the daytime, but during the night, she assumes the "position" of Saint Tail, a modern-day Robin Hood who steals from thieves and gives items back to their original owners. She is aided by her friend, Seira Mimori, a nun-in-training, and she is chased by her classmate (and soon-to-be love interest), Daiki Asuka (often called "Asuka Jr."). <br><br>
(Source: Anime News Network)

__Height:__ 146 cm

**Non anime roles:**
- Pichu and Togepi - Super Smash Bros. (Video Game)
- May - Guilty Gear (Video Game)


She is most well known for her role as Gaignun Kukai Jr. from the Xenosaga video game series