Birthday: November 7
Weight: 38.40 KG (OVA 7)
Height: 145 cm (OVA 7)
Ako is the elder twin sister. One way to distinguish her from Riko is by the hair clip she wears to keep her forehead clear. She has a reliable and level-headed personality, but can also be sullen, moody, and even a bit childish, getting embarrassed easily. Her demeanor differs from her sister's; she is more skilled in cooking, a skill she learned to assist her mother with housework. Ako has a high tolerance for alcohol, which she occasionally uses to her advantage, sometimes incapacitating Riko to have the lively Keita all to herself. She harbors secret perverted tendencies and frequently plans ways to seduce Keita, even hiding pornographic magazines in her room. At school, she serves on the school committee but often abuses her authority to get closer to Keita.
