I did a small Headcanon Post describing the differences between Fluffy Cannibalism and a Cannibal Fluffy and how that related to Crimson and his immediate family. The only one not mentioned is his father Stud but his story didn’t end too well.
As for Crimson’s children, so far Scarlett is the only one to inhabit his sociopathic traits, there are likely others but none of them have had the circumstances to realise it like Scarlett has.