Design sketches for many characters appear in
Phantasy Star - Official Production Compendium. This is an example of the multitude of enemy designs featured in the book. Coming from page 50, this enlarged section displays a member of the Fiend family of enemies. First appearing in
Phantasy Star II as Fiends, Wizards, and Caped Ones, they returned with different names for
Phantasy Star III. This enemy group was also present in
Phantasy Star IV as bosses with dialogue, revealing that they were intentionally serving the will of Dark Force all along.