Cutter! Marcus... is not a very nice guy. Fighting and fucking are almost equivalent to him as interests, so he will happily fight anyone who wants to! Teagan never had a girlfriend, or a boyfriend, but she can get misery, and being from a kind of trailer trash background.
Mr. Moody - Marcus doesn't like dogs. I don't think he has a problem with tattooed sociopaths, though. Teagan would probably like the imagery he puts forth, make up various things about him that she keeps to herself, and not really approach him.
Ella - Hahahaha I LOVE HER POWER. She sounds like a really fun character to throw anyone at, and good for shenanigans. I have no idea how Marcus or Teagan would react to her but whatever, that's half the fun.
Esther - Teagan is only a few years younger, but a very different upbringng, so I'd like to see if they get along. They might become friends! Marcus is kind of terrified of babies and small children. Dunno if Esther would be in a position to pick up on that but there it is. He probably won't really notice her much, as she's just a vendor blahblahblah. But Teagan will definitely approach a woman who looks near her age and doesn't seem like an intimidating, loud, crazy circus personality.