Professor Appel (Crimson Guard, from G.I. Joe)
Professor Appel (Crimson Guard, from G.I. Joe) appears in 7 issues in grailworth's catalog, and was first published in 1985. First appearance (unnamed in uniform): G.I. Joe, A Real American Hero #38 (1982), cover dated 1985.
First appearance
Deaths
Every appearance we value
Character appearances from the Grand Comics Database, CC BY-SA 4.0.