Zero :: Zero... is not someone too easely explained. Reploid who gained the power of alchemy when reality took the shitter (and we're not kidding), Zero seems like an assortment of extremes put together, acting like one thing the moment and like another the next. One thing is sure trough, is that she loves each and every being that ends up into her care deeply, and would do anything for them.
Yoku :: Yoku is a Tahnee child, abandonned at a young age, then bitten by a vampire when he was 16. Zero found him half-dead, as he completely refused to feed on anything else and make them endure the torment he had to go though for the days prior. Zero then took him in and adopted him as a son. Yoku is very calm, reserved, and polite - if the ear recieving it is deserving. He doesn't seem to have a mean bone in his body, unless for self-defence, where all the knowledge on sword-fighting becomes useful. He's aware he tends to give children the creeps so he tends to stay away.
Nebula :: Nebula's origins are... complicated, to say the least. Not even Zero seems to know for sure how Nebula happened... This gamer-girl, or loveingly called "ramping seizure" due to the many bright colors she is constitured, is Yoku's best friend. Opposite attract much ? Yes, indeed.

Chuurippu :: Orange's scoops sister, the two are close in dispice of being pretty different, and do not seem to have any problem understanding each other. Orange loves Chuu's flowers and hope that she'll be happy with her boyfriend, Unagi, who he has yet to meet. (And he wants to cover their marriage.... AHEM. >_>