He's consistently (although just slightly) abusive with his daughter, Sidney. He'll often leave her in the washing machine, completely forgetting about her.
He has a pretty good bond with Simon, having visitation rights once a month.
On a normal basis, he doesn't interact with Deena, much.
Sanderson has a pretty tight bond with Anti-Cosmo. He'll often go over to his brother's castle, just to annoy him or to talk, much to Anti-Cosmo's dismay.
Constantly up his butt, Sanderson follows him everywhere. Either to help him with something, or just to be around somepixie, since he gets lonely easily. He loves him like a father (nohomo), and has an easy time conversing with him.
Being genderbents evolved into friends, then evolved into something...deeper. They quickly lost interest in eachother after a week.