Elliott is the titular deuteragonist of Disney's 1977 film, Pete's Dragon, and its 2016 live-action remake. He is a large green dragon who is best friends with a young orphan named Pete.
There are roughly one-sh*t billion tropes so PLEASE look through them before adding one. Otherwise add what you like. ADDITION: PLEASE read through the trope description provided before submitting something. It's not a huge deal but too often people submit characters that don't fit just because they misinterpreted the title...
