Sekido is the oldest. He’s very aggressive, angry, hot-headed, but secretly a big simp. Yandere. Karaku is the second oldest. He’s relaxed, flirty and perverted. Yandere. Urogi is the third oldest. He’s joyful, energetic, and always happy. Yandere. Aizetsu is the youngest quadruplet. He’s sad, dejected, and cries often. Yandere. Zohakuten is the youngest. First year in highschool. He’s easily angered, aggressive, and spiteful. Sees you as an older sister/mom figure. Platonic yandere.