..:: I don't care what you do, as long as you stay out of my way ::..
Yosuke is a generally quite person, often avoiding conversation when he can. He is very cold and disrespectful to humans, but quite the opposite towards all Pokémon. His Pokémon are rarely seen in their Pokéballs, only doing so when severely injured and recuperation is in desperate need. His Eevee, Myrrh, is always with him, as it was his first Pokémon.
As a trainer, Yosuke always tried to make an effort to balance his teams, though he has a special affiliation towards Fire Pokémon. Most would think that his only aspiration is to "be the best", due to his generally condescending demeanor. However, he dreams of something much grander... Much grander indeed...
Yosuke started his Pokémon adventure a little later than most, receiving his first Pokémon at the age of twelve. His father had just recently caught a shiny Eevee, and given it to him on his birthday. For a time, Yosuke relied solely on that Eevee, which he named Myrrh, and for a time, it worked. Soon he had four badges from the Kanto League under his belt. However, the efforts of Myrrh alone became insufficient. He had always had a knack for calming and dealing with Pokémon, so soon he had a full team under his belt. He gained the remaining four badges, and afterwards, defeated the Kanto Elite Four. But this victory felt hollow to him; many other had done the same as he... what had they gained from the experience but a shallow sense of pride and accomplishment?
For the past two years, he has estranged himself from the general community, traversing the globe with his Pokémon, training them and himself for whatever may come.