Happy is an Exceed from Extalia, a member of the Fairy Tail Guild and of Team Natsu. Also is part of Dracokinight's Team Sonic along with Natsu and Lucy.
Despite his small stature and eccentric look, Happy is very loyal to his teammates and fellow guild members and has a fairly large knowledge of the wizard/magic world (more than Lucy and Natsu or Team Sonic). Since he was around Natsu Dragneel since his birth, Happy often emulates Natsu in his actions and responses. He is quick-witted and cheeky, especially to Lucy Heartfilia; however, Happy sometimes shows his little bit of dark nature, especially when making a comment on the devastating aspects of the magic of his comrades.
He loves fish and he doesn't like dogs (except for Plue, Charile Barkin, Itchy, and Amaterasu).He offers a comic relief with his catchphrase, "Aye!". Happy belief that Lucy and Loke are a cute couple. He holds a strange attraction to Exceed like himself and sucks on Loke's shoulder when he finds out that Loke is a lion. Happy has also developed a strong affection towards Charle, another Exceed who at first blows him off, but then begins to respect him.
Happy is a small blue Exceed with a white underbelly and a tail-end who carries around a green backpack. When using his Magic, he can grow a pair of large angel-like wings that allow him to fly around and carry others. His Guild Mark is located on his back.
- Unlike most memebers of Team Sonic, Sonic and friends meet Natsu, Lucy and Happy in a DeviantArt Story. "Team Sonic Looks for a Wizard"
- Happy was going to be the second cat to join Team Sonic after Puss in Boot, but after a dispute with Scroopfan (Creator of the SpongeBob Adventure Series). Puss was dropped. Whic makes Happy the first cat to join Team Sonic