Leonard is Lee's brother. He has the appearance of a brown and red thorny devil with blue eyes.
Leonard is pretty light-hearted and fun-loving as he enjoys nearly everything, from fighting bad guys to meeting new and exciting beings from different worlds. He cares deeply for his brother. Both see each other as their best friend, and hate to be apart. They fight on occasion but care for one another very much as shown when Lee started comforting his brother when he started crying when Seri dies. He also is shown to be somewhat of a hot head.
He fights using a blaster.
Trivia:
Leonard is named after his maternal grandfather.
He is the first character to cut off another character from using a swear.