AQUARIUM。
Teo（AQUARIUM。 ）
Teo François is the 'AQUARIUM.' The protagonist of the series, the eldest son and heir of the noble François family.
Marine（AQUARIUM。 ）
Marine is the 'AQUARIUM.' The experienced maid of the François family and also a senior in Aqua's work.
Fubuki（AQUARIUM。 ）
Fubuki is the 'AQUARIUM.' Teo's older sister, who manages the territory when their father is away.
Aqua（AQUARIUM。 ）
Aqua is the name of 'AQUARIUM.' The heroine of the series, working as a trainee maid in the François household.
AQUARIUM。
《AQUARIUM。 》（あくありうむ。 ) is a romance adventure released by ENTERGRAM, produced and starring Minato Akua, set in a Western-style aristocratic mansion, depicting the relationship between an heir and an apprentice maid.