If a Warriors AU, Reigen absolutely would be from another clan and claiming he's part of a different prophecy than the one Mob is involved in or he would be a loner claiming to be the leader of some far off clan! I imagine his actual name would be something like fox or half due to his markings. Dimple might just be a straight up ghost or a cat from the Dark Forest who's leaning the error of his ways.

Shigeo has a star mark hidden under his hair and the hair is absolutely optional for these designs. He would be named something commonish like Nighttail. Ritsu would be named something like Duskheart, Tome would be named Breezegaze, and Teru would be something like Goldshine or Sunpelt! I'm torn on if Shou and Claw would be from a loner gang like Darktail's Kin or Bloodclan, but if Shou has a warrior name I like to imagine it's something like Tigerblaze or Flamestrike.

Design wise, I like to imagine that the espers or whoever may have abilities if there's magical prophecy stuff going on have the eye dots on the back of their ears.