Rengoku was a very happy and smiling guy, unlike Giyuu.. A lonely and depressed guy, despite them being hashiras they were quite strong!

One day the hashira master decided to put Giyuu and Rengoku on a mission to kill a demon, they walk through the forests with their katanas, so Rengoku decided to break the silence.

"How do you feel about doing the mission with me, giyuu-san?" He says smiling