>>716216224Crests are the result of putting dragon blood into humans, so I always thought Nemsis got his from killing Sothis and drinking her blood while his bandit buddys got theirs from the Nabateans they butchered during the events of the red canyon massacre
Considering that they can pass down the crests, the dragon blood must have done something with their genes, so there is the very vaguest of incest at play. Realistically its still below Fates cousin fucking incest levels though.
Even then, this stuff happend centuries ago. By the time of TH the blood of the original bandit crestbearers is so dilluted with normalfag blood over many generations that there is no incest left.