Gwen Tennyson | Ben10 Destroy All Aliens characters

Gwen Tennyson

Ben's cousin Gwen is also ten years old, and the complete opposite of Ben: precocious, level-headed, independent and responsible. Gwen is the voice of reason, always trying to think ahead, plan and calculate the consequences. She also came into possession of a book of magic spells on their shared summer vacation and has been constantly working on improving her spell-casting skills.