Yellow Viper was a retired gangster-turned-art teacher.
History
He used to be involved in the Asian Boyz gang. In an incident, Lucifer Morningstar offered Benny Choi a favor, kept him out of jail and gave him his first show, while his friend, Yellow Viper, took the fall instead. When Viper was released, Benny attempted to frame him by having his assistant, Hector shoot up Benny's show, but with Lucifer's help, Chloe Decker figured out it was all staged.