Very reserved at times. If someone tries to start an argument with him, he'll often run and hide. Other times, he has more of a 'daredevil' attitude, partially influenced by his older siblings (especially Marine). 
He also likes to think of himself as a "Youngster" Pokémon Trainer who wants to stand around outside all day, waiting for people to challenge.

Brother is Steve and sister is Marine. Corey is the youngest of the three.