So, my vote is: Rat.
Ito should have a rat because they're small, they're easy to draw, they're good for apartments and because they're very affectionate creatures for the short time they play companions to us.
My roommate, OTOH, thinks she should have an iguana. Because my roommate has an iguana and always thinks characters should have one as pets.
(Happy, Cheffie? I got off my butt and registered...