So far, he has only appeared in Master of the Eclipse, being absent from Lord of the Blood Moon for unknown reasons. The series creator, however, has stated that he left the Nebulian Legion and is now wandering the universe as a vigilante.
Personality[]
Penumbra is serious and solemn, and not one to take jokes. In Master of the Eclipse, he is shown to be attached to his goals; he fights Umbra on sight and reports his presence to Nebula. However, he is also very cynical, as shown when he questions Nebula's motives and leaves her army.