Giyu Tomioka Is a demon slayer Hashira that uses Water breathing. He is 21 years old. Giyu uses a Nichirin Katana to kill demons. Giyu mastered 11 forms of water breathing. Giyu can activate his demon slayer mark. Giyu has a stoic and unbothered expression on his face. Giyu has a reserved personality and a very strong sense of justice with no tolerance towards those who don't know their own limitations. He has a older sister name Tsutako Tomioka. He also has a friend name Sabito who sadly died.