Paul is a 15 year-old Pokémon Trainer from Veilstone City of the Sinnoh region. He is a seasoned trainer, having traveled through Hoenn, Kanto, Johto, and Sinnoh. He has also participated in the Indigo League, Silver, Ever Grande, and Lily of the Valley Conferences, but failed to win each time. His next objective is to travel to Kanto and challenge the Battle Frontier, aiming to conquer it as Ash did before him.
Paul is taken from the end of the Diamond & Pearl series. He also has backstory in the form of events from a fanfic named Travels of the Trifecta! (where he is taken after the events of the currently-unwritten 37th chapter). While his character is basically the same, he is additionally physically frail. His mother died when he was five years old, and thusly does not remember her... nor does he care to know. His father is none other than the Pyramid King of the Kanto Frontier Brains, Brandon. Brandon left for Kanto soon after his wife's death, leaving Paul to be cared for by his older brother, Reggie.
Essentially, Paul is an asshole. He is very strict with his Pokémon and does not believe in bonding and forming friendships with them. The same goes with most people as well. He has a tendency to be blunt with his honesty, so if he thinks one is weak, he will outright say so. However, he has secrets of his own that he's rather bad at hiding. Still, most won't get a chance to prod at him before he pisses them off to the point where they break. He has a stubborn streak that won't die and never hesitates to resort to violence if he deems it necessary.