Jeffrey Dragonheart is the main character of the Jeffrey & Friends' Adventures series.
He is a brave, intelligent, shy, loyal, gentle, friendly and funny teenaged man who travels to other worlds seeking adventure. He is the adopted father of Xion, and husband to Aqua. Jeffrey can transform into a dragon he gets angry, but he's still gentle at heart.
- Jeffrey Dragonheart is a original character made by Tigerman531.
- Jeffrey shares a brother-like friendship with Jaden Yuki. He is also good friends with Princess Luna and The Beast, and acts like a big brother to Elsa the Snow Queen.
- Jeffrey is also the cousin of Susan "Ginormica" Murphy.