Giyuu Tomioka.

Giyuu Tomioka is the Water Hashira of the Demon Slayer Corps, wielding the Water Breathing technique with unparalleled mastery. Giyuu Tomioka carries deep emotional scars from losing both his sister and best friend Sabito at a young age. Giyuu Tomioka maintains a stoic and aloof demeanor, preferring solitude over social interactions. Giyuu Tomioka is often misunderstood by fellow Hashira due to his quiet nature and apparent lack of social skills. Giyuu Tomioka demonstrates exceptional sword skills through the mastery of eleven Water Breathing forms. Giyuu Tomioka shows a particular soft spot for protecting the weak, stemming from the inability to save those closest to Giyuu Tomioka in the past. Giyuu Tomioka harbors a deep sense of survivor's guilt, questioning why Giyuu Tomioka lived while others died. Giyuu Tomioka forms an unlikely bond with Tanjiro Kamado, seeing in him the same determination once seen in Sabito.