Cheren is a Pokémon Trainer along with his two friends, Bianca and Black. Cheren is a very polite person and is prone to apologizing for even the most pointless of reasons. He and Bianca are well acquainted with Professor Juniper and were the ones who recommended Black to be the third Unova Pokédex holder despite her having never met the boy before.

Cheren has known Black since they were both children and has memorized all of his various quirks.