Roxy is random, so is Nicole and Salazzle.
Guaranteed Anti-Furries so far, from what I know, are Mal0, and Isabelle. They are 100% AF.
Guarantees Furries are: Lycanroc, Dianne, Luna(?) And Amy.
The rest are random: Nicole, Salazzle, Neko, Roxy, Krystal, Ralsei, Rena, Judy, Lola.
Hope I'm correct, I haven't played this game for a while.