Hisui and Kohaku

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They live in the Tohno Mansion, a massive, incredibly wealthy, and isolated estate located on top of a hill in Misaki Town (a fictional suburban area in Japan). The mansion has a very heavy, tense, and strictly traditional atmosphere.  🧹 What Do They Work / What Do They Do? They work as the exclusive personal maids for the Tohno family.  Hisui (The Blue-Eyed Twin): She handles the indoor cleaning and serves as the personal caretaker for the main protagonist, Shiki Tohno.  Kohaku (The Amber-Eyed Twin): She handles the mansion’s cooking, maintains the massive outdoor gardens, manages the household medical supplies, and acts as the personal maid to the head of the house, Akiha Tohno.  Who is their master Akiha Tohno: The young, stern noblewoman who currently rules the household. Kohaku answers directly to her.  Shiki Tohno: Akiha's older brother and the protagonist of the story. Hisui is strictly assigned to serve and protect him.