i met with valygar and had valen with me after a little talk valen starts saying to valygar that he will die and such things and then valygar gets hostile and i didnt like that beacuse i want valygar in my part so i loaded my auto save and let valen stay outside and then i got him in my party and after i got valen in to will she threaten him more later or will it lead to some bugs? my last question is can valygar stay with an evil party?

Nope. I did just that (i also wanted them both in my party), and never encountered problems.

Yes.

thank you alson one more thing if i feel like walkng around slaying a whole town will he still stay? hehe....

Actually, if you have ToB, yes, he will. :D

Correction. He will NOT stay if your rep. goes down below 2, even with ToB. Oh, and also he doesn't get on with Edwin at all...

My previous evil party would disagree, as they had a reputation of 1, and Valygar was still a part of it. An unhappy part, perhaps... but still a part.