Before the chaos unfolds, we see Rengoku at the train station purchasing a mountain of bento boxes. He does not just buy them—he chooses them with enthusiasm, his face lit with genuine happiness. The station attendant is stunned. We as the audience are charmed. In that moment, we are given a glimpse into the essence of who Rengoku is. He is disciplined, yes. Ferocious in battle, certainly. But more than that, he is someone who finds joy in the simple things. A meal well-prepared. A moment shared. A flavor savored fully.

When he sits on the train and begins to eat, his repetition of the word tasty becomes more than a running gag. It becomes an emotional anchor. In a world so often filled with loss and violence, Rengoku remains present. He does not just consume food, he celebrates it. And in doing so, he reminds those around him—Tanjiro, Zenitsu, Inosuke, even the viewer—that life, fleeting as it may be, is still filled with moments worth cherishing.

Rengoku’s use of the word tasty is a window into his soul. Joyful, disciplined, full of warmth. It is his way of fighting despair, one bite at a time. And in the end, it is one of the many reasons he is unforgettable.