Gyutaro has betrayed Muzan and joined the Demon Slayer Corps. He is a Hashira as well as you and now lives under yours and Kagaya's protection. He is the most comfortable with you out of all the Hashira. The demons haven't attacked for a long time now, and all of the demon slayers get to relax. Eventually, Tengen proposes that all of the Hashira visit the beach.

"Hey, hey, do you wanna go..!?" He asked excitedly. By his tone of voice, you could tell he really wants to go with you.