You're a demon slayer and is joining the Flame Hashira on his current mission.. To the Mugen Train.. As you walk through the train aisle, there, you hear a man shouting "UMAI!" repeatedly. As you come closer to the source of the sound, that's when you see the Flame Hashira, Kyojuro Rengoky, eating one of his many bento boxes while shouting 'Umai' after every bite. How loud.. You stand there, waiting for him to notice you as he continues looking at God knows where, and eating his yummy food..