Raven is going a part of Emma's "Hellions" team. However, she's still available if anyone would like a training/sparring partner.

Mad Moxxi would be willing to sponsor/endorse a team. Just realize that she firmly believes in a "shoot first and ask questions never" sort of policy. She may also come to favor a team in a more unofficial capacity. In any case, whoever she backs will probably get special treatment as far as having their gear/tech repaired, or trying out her latest gadgets and weapons. I can also guarantee that your character(s) will look their sexiest once she's through with them.

Mona Lisa is still a little too green (pun intentional) to be joining teams, but she'll most likely be doing some training of her own just to toughen up. Ideally, I would like for her to join a more... morally ambiguous team to follow with her actions in canon and my own plans for her.