Tolys was born and raised by a family of Pokemon breeders. He's been eager to follow in their footsteps and has dreams of taking over the family's daycare facility. Many of the Pokemon on his team came from trainers who rejected their eggs from the facility, including his now-Leafeon who serves as his main Pokemon. He didn't have much of an interest in battling growing up, but his parents soon realized their son's potential and enrolled him in various junior tournaments where he proved to be a fierce opponent. He began participating in competitions throughout the rest of Europe soon after.

He's grown up with a love for Grass-types and uses a mix of attack and defence in his battles. Despite his low ranking in the global standings, his name is well-recognized and is highly respected. Rumours have been circulating in Lithuania that he is the potential successor to the Grass-type Gym in Alytus but Tolys has stated many times that he is not interested in the position.