Shizuno Takakamo is a first-year high school student at Achiga Girls' Academy in Nara Prefecture and the main protagonist of the spin-off manga "Saki Achiga-hen episode of side-A". In her elementary school days, she befriended Nodoka Haramura and together played mahjong in Achiga's mahjong club. She was the club's second best player before it was disbanded. Upon seeing Nodoka on television as the middle school individual champion, she decides to re-establish the club upon entering high school. Her goal is to go to the national high school team tournament and play against Nodoka.
Her special ability allows Shizuno to block other players abilities. The more tiles is taken from the corner of the wall, the stronger her ability is. Literary "the deeper players go in the mountains, the closer they to her territory". That's why she was called The Master of the deep mountains during the semi-final match.