Rena Nakano is a minor but significant character in the anime and manga series 'Go-Toubun no Hanayome' (The Quintessential Quintuplets). She is the late mother of the Nakano quintuplets and is portrayed as a gentle, caring, and wise woman who deeply influenced her daughters' lives and values. Despite her early passing, Rena's memory and teachings play a critical role throughout the series, driving the quintuplets' motivations and shaping their development and relationships.