TV-Series
Description
Nazuna Takanashi is the youngest Takanashi sibling and Souta Takanashi's only younger sister, initially aged 11 and later 12. As the fourth sister, she possesses remarkable height for her age, reaching 170 cm in the first season and growing to 172 cm later, nearly matching Souta's stature. This growth causes Souta recurring distress.

Her personality blends maturity beyond her years with a mischievous, manipulative streak. She deeply respects and adores Souta, acting as his primary supporter within the family due to the harsh treatment he receives from their older sisters. Witnessing this childhood mistreatment motivated her aspiration to become an "elder killer" to protect him, though she currently spares only one sister, Izumi. Despite her supportive nature, her effortlessly manipulative behavior, using charm to sway her sisters for Souta's benefit, unsettles him and fuels concerns she might develop sadistic traits like their older siblings.

She significantly misunderstands Souta's relationship dynamics, mistakenly believing he is a masochist. She inquires if his coworker Mahiru Inami, assumed to be his girlfriend, enjoys hitting him. This misconception leads her to seek training from her sister Kozue in acting violently, stemming from her desire to "protect" Souta.

She interns at the Wagnaria restaurant under the pretext of a school report assignment, facilitated by bribing the manager. She assists sporadically without formal pay, demonstrating limited stamina due to her age, particularly during late-night shifts. At home, she actively participates in household chores and manages familial conflicts, often mediating between Souta and their older sisters.

Her family relationships highlight intense loyalty to Souta, whom she treats with open kindness and respect, contrasting with her cunning approach toward her older sisters. This dynamic reinforces Souta's reliance on her as his sole familial ally. Her continuing height growth remains a sensitive topic, occasionally triggering Souta's anxiety about being overtaken physically, symbolizing shifting dynamics.