Dragon was a hyper and healthy young baby boy, his parents were captured and reduced to Fairy Dust hours after his birth, so he never knew his parents, he ended up being adopted by Ms. Helga Powers and Schnozmo, where he quickly befriended Lewis and Louie, during the events of Spellementary School, he met Poof and Foop, both start to get on his nerves for putting his life on the line every time he sees both of them together, his life was put on the line by Timmy Turner in the Season 12 opener episode Hole In The Universe, so he ends up disliking Timmy Turner, as for the other characters in the series, except for his family, he has never interacted with so far
Cookies (Very easy to see in the Season 12 episode Cookie Problems)
Seeing humans get hurt (It makes him laugh and giggle)
Anyone else who does something to put his life in danger
- Almost every time Dragon grants a wish, He puts someone (Or Everyone)'s life on the line.