Chaton is a kitty girl and the strongest of the Bishops. Chaton is always happy, almost to an annoying level. She has a comical, yet entirely serious, crush on Alan, much to his distaste as Alan, ridiculously in contrast to his looks and due to an ironic twist of his situation with Edward, is a cat phobic. She is a good friend with Loco, even though Chaton is quick to get on Loco's nerves. Chaton deeply cares for Loco and constantly looks out for her well-being, though this usually tends to annoy Loco.

Chaton first appears in the 6th Round of the War Games and Alan was surprised at her appearance when she removed her hooded robe. She quickly manages to defeat Alan (who mistook her for a Knight before the battle began) due to his Cat phobia, which he inherited from Edward. During Halloween and Alan's battle, Chaton and Loco kept arguing over who would win while watching from a castle balcony. During Phantom and Ginta's battle, after Ginta's Puss in Boots was introduced, Chaton commented that it is "the greatest Guardian ever", making her the only one who took it seriously.

In the anime, after the War Games are completed, she and Loco, while traveling through the desert, get captured by the Ghost Chess along with Team MÄR. Working together, all of them escape the Ghost Chess, although due to Loco's constant use of Darkness ÄRM Loco is reverted back into a baby. Chaton is quick to begin taking care of Loco, and later watches the death of Alan to King, much to her horror. During Alan's last moments, he gives Chaton his earring and she seeks out other Chess Piece members and interrogates them on King's current location. After King is defeated, Chaton lives together with Alan and Babbo, who help take care of Loco. She uses cat-themed ÄRMs.