what would a rouge of blood be able to do?

A Rogue of Blood sounds like someone who may insert themselves in a friend group- Like. Stealing bonds and distributing them, maybe entering a group of close friends and becoming everyone’s buddy, but also possibly stealing someone’s friends maybe? Also stealing Blood sounds like a Vampire, but perhaps a Thief would be better for that, or maybe as a Rogue of Blood they’re a Vampire that spread the Vampirism to others. Hmmmmm.