Signum Mortis was born out of a breeding that would've never happen under normal circumstances. Ghostface 5017 found a soulmate and infinite love with Memento Mori 4915 . None of the handlers of the parents knew about it until it was too late. Glad every puppy was healthy they decided that Signum Mortis should live with his dad while Monumentum should live with his mum. Signum Mortis being the older brother always acted it out but also was always there for his little brother Monumentum.