If I remember correctly, this guys had a thing for West. Since North is trying to revive West for whatever reason, I’m guessing he’s now working for north as a hired gun until the day West is revived.
If this is true, then he’s an idiot. Either North isn’t as bad as she’s being portrayed or she’s a total BITCH. Whatever it is, the risk isn’t worth it.
More than a natural transition, this feels like forced plot by the author. “Uuuh remember this guys? He was super strong and was a breath of relief for humans in this world. Well… Now he’s a bad guy!... fuck you!”