Kilmo was first identified in the 2018 reference book Solo: A Star Wars Story The Official Guide, written by Pablo Hidalgo. Although he was stated to be human in Solo: A Star Wars Story: Expanded Edition by Mur Lafferty, when he later appeared in the first issue of the Marvel comic adaptation of Solo: A Star Wars Story, Kilmo was depicted as an alien.
- Solo: A Star Wars Story The Official Guide