Sakurako Ōmuro is a first-year student at Nanamori Middle School and a candidate for Student Council vice-president. She possesses wavy blonde hair, brown eyes, and an average, petite build that sometimes makes her insecure. Red and black hair clips adorn the left side of her head.

Academically, she struggles significantly, often lazy and unreliable about homework, frequently needing help from Himawari Furutani. She forgets instructions quickly and misspells kanji, leading to unintended meanings. This disinterest contrasts sharply with her athleticism, which she uses to tease less sporty peers like Himawari.

She favors convenience foods, resisting cooking lessons. When asking Yui Funami for dinner advice, she consistently chooses pre-prepared ingredients over homemade recipes, especially enjoying Isobe fries. Her personality mirrors Kyōko Toshinō's in gullibility and playfulness, though she lacks Kyōko's academic cramming abilities.

Her relationship with Himawari Furutani is defined by a contentious rivalry for the vice-presidential role, marked by frequent arguments and Sakurako teasing Himawari's breast size. This dynamic stems from a deep childhood friendship; Sakurako's sister Nadeshiko once arranged a mock wedding for them. Sakurako retains underlying affection despite their conflicts.

Within the Student Council, her interactions with Ayano Sugiura show growth. During a *Nachuyachumi!+* OVA sleepover, Sakurako actively expresses gratitude for Ayano's support and thoughtfully prepares a meal, a departure from her usual reliance on pre-made food, highlighting developing responsibility.

Her family relationships are complex. Her older sister Nadeshiko often scolds her for laziness and poor common sense. Her younger sister Hanako quarrels with her over stolen food like milk or yogurt. Yet they share mutual care: Sakurako makes porridge for Hanako when ill and wins her desired pajamas; Hanako reciprocates by making pancakes after sensing Sakurako felt excluded.

She admires Kyōko Toshinō, bonding over their energetic personalities. She maintains friendly ties with Akari Akaza and Chinatsu Yoshikawa, the latter letting Sakurako play with her hair freely. She views Himawari's sister, Kaede Furutani, favorably for her kindness, though Kaede's innocent remarks about Sakurako's small bust annoy her. Sakurako once took Kaede "hostage" to pressure Himawari into homework help.

She dislikes cockroaches but shows no aversion to snakes. She remains generally resilient during group activities like summer ghost-story sessions.