薄墨 初美

Hatsumi is a third-year at Eisui Girls' High School in Kagoshima Prefecture. She and the other members of Eisui's team are shrine maidens; she belongs to a branch family of the maidens' lineage. When it's her turn to play, she comes out in a ceremonial headdress and puts it back on afterwards. Hatsumi is quite energetic, but can be quite stubborn, still believing that she can make a hand while in the north seat after she was repeatedly blocked by Sae Usuzawa and warned by her teammates. She seems to care a lot about Komaki's well being as she doesn't want Komaki to overexert herself. Hatsumi loves to swim.

Hatsumi's ability is activated when in the North seat. uses the Gates of Evil, (鬼門, Kimon), which refers to misfortune hailing from the northeast as demons and evil spirits can enter in the human world from there. When it's active, Hatsumi is able to easily call the North and East tiles. Afterwards, she draws in the South and West tiles, Ura-Kimon (裏鬼門, The Back Gates of Evil), thereby aiming to achieve either the Shousuushii or Daisuushii yakuman.