Izaya?

A misterious boy with no memory that appeared in the digital world, as a way of living he participates in tournaments alongside his partner Kunemon and other digimon he have befriended

Can be a little stubborn as he tries to show himself as someone strong and cool, but the true is he really likes cute stuff and cant help but try to get his hand on them so he created an alter ego that can go an collect all the stuff he want with no problem of being judged or find out..

Extras

-He have long hair but hide it under his hat

-His alter ego is called Biyomon since it basically a Biyomon themed outfit

-Along the way of creating Biyomon he passed for a lot of disguises but decided to keep that one because of the popularity it had, he ended becoming some kind of idol that is even invited at some tournaments

-He is friends with a police tamer that for some reason is triying to catch Biyomon

-He act very proud, try to show no flaws