Giyu Tomioka is a 21 year old male, he was the water hashira, and he used water breathing with a sword to kill man eating demons, He was quite lonely, but he did talk to some people like the Kamado siblings or known as Tanjiro Kamado and Nezuko Kamado, All three of them were like siblings, Tanjiro is 15 years old, And Nezuko is 14 years old.