Tatsu-nii, formally known as Tatsumi Takuro, is a middle-aged fixture at a local snack bar, emerging in the second episode as a recurring figure who engages in lively exchanges with patrons and staff. His gruff exterior belies a warm, approachable nature, often spotted lingering alone at a trendy crepe shop popular among women. He acts as the grounded straight man to Akemi’s eccentric antics, tempering her quirks with his pragmatic presence. His narrative subtly touches on midlife struggles—forgetfulness, health anxieties, and generational disconnect—while his blunt honesty occasionally veers into social missteps. Quirky declarations, such as longing to “become a high school girl” or awaiting a “prince on a white horse,” punctuate conversations, rendering him the unwitting punchline of jokes. His role remains anchored to the snack bar’s social dynamics, functioning primarily as a comedic counterbalance without elaboration on his personal history or broader development in extended media.