Senta lives on Mikan Island with his sister. He is known for playing practical jokes on visitors to the Mikan Gym, including Ash. He thinks very highly of his sister and the rest of the Trainers in the Orange Crew. Even when Ash informed him of his placing in the Indigo League, Senta told him to not even compete in the Orange League, saying it was tougher unless he was an elite Trainer.
Senta has at least one Pokémon, as he held up a Poké Ball when he agreed to battle Ash before being interrupted by Cissy.