That's a very, very abbreviated description of Antisocial, but yes. I do not think he is schizophrenic in any way, though; nor manic. He shows none of the signs. It's even a little difficult labeling him "insane", as he is perfectly functional and able to care for himself.

And Izumi... Mrr. She doesn't have the personality to hold power, really - yes, she's happy where she is, but she'd be awful with any kind of authority.