Cas is usually sweet, kind and awesome, but he can also display a darker side, which will grow in future. He is highly gullible, but hates being fooled or used in any way. He can also lose his temper, much in the way his mother can. He can also easily be manipulative. He doesn't get close to many people, thanks to poor people skills. As an adult, he'll only really be close to his fellow pack members, and especially Alessia.