Quillon is a Pokémon Trainer, researcher and member of Project Mew. He rescued
Ash Ketchum and
Goh from a blizzard while they were trying to capture an Alolan Ninetales in the glacial area north of Mt. Tengan. He was able to collect data on Regice as it's an important Pokémon in the search for the origin of Pokémon in their Project Mew research.