Hmm... maybe Alix will be the most welcoming and accepting because he knows how it is and feels to be the newbie. However, then again, I dunno if he'd be welcoming and accepting because of the way he acted in the comic wanting to hide... so maybe Dax would be.
Weaver will be the most welcoming because Weaver likes booty and is a horndog (hornbat? hornchupacabra?) and Adele is hella-sexy. Also, species congruency doesn't seem to matter much to him either. Alix will be the least welcoming by process of elimination because Dax is all spiritual and Adele's abilities will definitely make an impression on him. I also believe Alix will feel left out a bit since these three will have an obvious, strong commonality and Alix seems to take offense to bonds he's not a natural part of.