They're both platinum gray and blue striped calico cats. Kaiser's the older of the two but he died in the fire when he was eight, along with their mother and father.

Aaron, the younger one and was five years old at that time, managed to survive but end up with a trauma of the incident. He lived with his grandfather, a specialized researcher, in an old hut in the middle of the jungle. He's twelve but he enrolled to college very early, taking a course for Biology. He can be quite girly at times and he hates cockroaches and fire (Because of the incident).

He only has a few friends but they're often doing their chores. So, he spent most of the time playing with his pets, exploring other places and sketching. If you met one of his friends, they would say that Kaiser's spirit lives in Aaron's body. He would take over when Aaron went into some danger. Some say that Kaiser was a skilled fighter and an assassin, and can be very dangerous to fight with.

Talk about some major bromance issues, eh?