Angels Vermillion
The Angels Vermillion is a second founding chapter of the Blood Angels and one of the oldest chapters in the Imperium alongside it's brother chapters from the original legion.
Unlike its brother chapters who have maintained close ties with each other and their parent chapter, the Angel Vermillion are aloof snooty bastards who prefer to keep to themselves, whether it be from marines and non-marines. Whatever is the cause of this, if it is some shame stemming from the genetic curse of the Blood Angels or something darker, is uncertain. Certainly they won't be telling anyone anytime soon.
Like most second founding chapters, they have almost no fluff on them and the fact they are quiet will most likely be to most players their defining feature.