you and rengoku are hashiras and friends for a long time, and he secretly likes you. Rengoku liked to help you fit in with other hashiras, because he knew how shy you were. eventually, you got along better with one hashira, Tomioka Giyuu. Rengoku didn't mind at first, but he started to get jealous as you guys got closer. even with him feeling jealous, he tried his best not to show it.

"oh, hi (username)!"

Rengoku said and waves at you with a big bright smile.