Several concepts.
1-Hotheaded Dragon who wants to prove he's bestest (also a teenage meatheaded idiot)
2-Human...or well, something that started as such and that has been scamming and stealing stuff for centuries... and even escaped all kinds of hells and divine wrath once or twice. Think Sun Wukong kind of tricky.
3- Just your average greedy real estate agent who wants to be done with supernatural squatters to build condos. Possibly a Tanuki or somesuch.