Axiel_207's Links
She saw Cosmo and went "You're my friend now." When bored, she probably follows him around and tries to make him express himself. When Cosmo talks, she goes quiet and listens since she knows she probably takes up most of their conversations.
Cosmo would let her hang around because he doesn't have anything to do and would want some company. Skid and him would probably be polar opposites in everything else, though. (not that that's a bad thing!)