Born in Fire
The alleged head of the Grimm Family.
Leopold appears to be a teenage boy. His demeanor as “Josh” was obnoxious, but he became more grandiose when he revealed his other identity.
Leopold Grimm claims to be head of the Grimm Family, a demonically-enhanced criminal syndicate active in Atlanta. To what extent this is an actual “family,” and how exactly the Crosses are related to them, remains to be seen.
When the Crosses met Leopold, he was posing as a teenager named Josh. He speaks with a British accent, and made use of some kind of illusion to escape the Crosses. He is keeping Linda Cross, though where and why are as yet unclear.