Masuyo wasn’t always the fast talker, slow thinker she currently is, in fact she used to be the exact opposite. But when she was young she slipped and cracked her skull open on a rock (the very same rock that she wears around her neck) the blunt-force trauma caused enough damage to provide her with regular migraines and a mild case of ADD. She isn’t fond of staying in one place for too long, this can be clearly seen in her love of running. Masuyo is very supportive of her friends and does whatever she can to help them improve their lives if she is able to.