XD.... I don't like the Idea of Sesshomaru fighting Raizen, because he'd probily loose! Sesshomaru is tough and we all know he's got power, and now that he's got the Bakusaiga he can dispose of his enemies pretty damn quick, but Raizen is a reknowned Battel Demon and is referred to as a God of War. I'd think he'd knock that sword out of his hand and beat him into a bloody pulp (so long as he doesn't get cut)...XD Which I don't like at all:(

Also I think that Raizen, like Yusuke is someone who can be reasonable and easy to get along with, so unless there was bad blood between them, I pick Friend.

Sesshy-sama does not socialise.

Yes he does, if he feels the other demon is worthy. Lord Raizen is a King of Demon World so it would be pretty stupid for him to look down on him, I mean he isn't THAT full of himself. xD Also there is Rin and Jaken to consider. If Sesshomaru was strictly antisocial neither would be permitted to follow him around, a truly antisocial person needs no one, not even servants.

I think Sesshomaru just wouldn't give a damn unless Riazen did something to him.