Onyx was raised in a traveling circus for years. He didn't know his parents and was told that the ringmaster was his father. The circus gave him the name Onyx because it was his stage name. He enjoyed his time at the circus with learning all the acts and tricks. But it wasn't honest work, the circus used many methods to obtain money from people. As a kid, Onyx was used as a distraction for his circus mates to steal money from people. Onyx didn't care as long as he was a part of it.

After the circus closed, Onyx was told the truth that his father wasn't the ringmaster. Onyx took the circus name, Circus Delirium, as his last name and decided to explore the world in search of secrets and tales. As well as wanting to meet his real parents.

Onyx is the type to always smile and greet people warmly. Wiling to help others and wanting to look for his purpose in life. As he was traveling, he enjoyed seeing people's lives and learning about culture.