Not much is really known about Nico except for the facts that they are the child of Death, and have a slight addiction to sugar. One day, God knows how long ago, Death just stepped out of his house in purgatory and said “I have a child now”, and just went back into his house without another word. They are a genuinely good person though, and they love helping people, especially those who are experiencing grief or loss. He currently lives with Azriel and Aranix for reasons still unknown.