The Necrojack

Design sketches for a character called the Necrojack. With a lot of characters I think their physical form or place in a story. Moe and Detritus were sketched out before I thought of their names. King Roach was an idea before he/she had title. Necrojack, however, was a name first. Necrojack sounded cool. Who was he? Was he even a he? I didn't know.