Anubis is The King's most trusted adviser and manages some of the king's affairs and gives his harsh and cynical opinion.
As a child, he grew up with high expectations from his peers as an heir to the "Anubis" lineage as the kings personal right-hand man. But he grew up without any fatherly or motherly affection as his father was always with the former king and his mother is not mentioned at all. He was later appointed by the late king to be a companion to Leonhart as a child. At one point, he became sick because of a weak constitution as noted by maids that whispered outside his room.
After Leonhart was injured after protecting him from an attack from one of the bandits and subsequently managed to escape and get rescued by a search party his attitude changed dramatically. He then vowed to be a loyal retainer to Leonhart even if that meant he would lose that little "Warth" he felt from Leonhart's friendship. He then accepted his role as Anubis and thus "lost" his old name.