I've been dying to reply to this all day and been cracking up over who you think would like who. Here's my view on the AE gang.
April has her best friends and her true love so she wouldn't be interested in anyone else. She'd hate all the female characters in all your stories, especially any that were prettier than her. And also Morgyn as she doesn't need another too-powerful, attention-seeking, self-centred blond in her unlife.
Caleb would be grateful to just have friendships, until he inevitably effed them up. He has his eye on a few of the ladies of your casts but he can't tell you who because April might hit him. He probably wouldn't dislike anyone. Beggars can't be choosers.
Faith would probably like L Faba, Vern and Dew and take a certain superficial interest in pretty much any of your male characters, except Dandy and possibly Gawain. She'd have a blast with those knights in Camelot. She'd hate Verena.
Lilith would like Micah a lot; they could eat plasma fruit together and try not to think about the people they've killed. She would also be drawn to Gwen. She'd despise Verena, Morgyn, Morgana and pretty much the whole B2W cast. I can see her being oddly drawn to Ian.
Melinda is everyone's friend, but especially those who need her help. I can see her falling over herself to save Micah, befriending Cordelia and enjoying Hailey's company and not being so very keen on Richard, Masato, Curtis. Although she wouldn't hate them because hate is such a strong word.
Seth is all about Seth. Unless anyone can tempt him, he'll be lying in the forest somewhere, admiring the trophies he indiscriminately took from your human cast members. But he does enjoy everyone talking about him. Especially when you're saying such cruel things.