
The soak ally. He soaks for you, he soaks for others. The willpower doesn't hurt, but he's honestly too expensive for that and the ally slot without charisma too valuable. You should try Police Badge and Bandolier before playing xavier for the +1
If you want to aggressively keep the map free from enemies, you should look for allies in the local police station.
As a defensive card in a slot important for the offensive, he is probably preferred over Beat Cop(2) only by Diana Stanley and Carolyn Fern, who likely do not want the +1.