Cuel started off life as newborn mortal. However, the winter was harsh and so he did not survive. His innocent soul traveled to, Novela, the land of the gods. Where he was transformed into two demons Cuel and Lo.
Cuel and Lo became the sons of the God of Death and Princes of the Underworld. They were given the title The Brother Grim, with the purpose of collecting souls to feed the demons of The Underworld.
Yet, they were give one simple rule, never kill a mortal. Lo did not listen, and thus caused Cuel to be banished, until he has destroyed his brother. Now, Cuel wanders The Isles looking for his brother and a place to live while hiding his true identity.
Do you seriously think I am butler material?
Is that really you My Lord? How many years has it been?