Fries is a grumpy, serious, and antipathetic character, especially with his enemies. He is very rarely joyful or seen smiling. Fries has shown, on several occasions, that he admires people who show strong skills of leadership and assertiveness, while also looking down on those who lack it. Despite his serious attitude, Fries is also shown to be a bit dimwitted. Fries was usually shown to be eating his fries. This could mean that Fries is, or used to be, a cannibal.