Satsuki Kiryuin is another main heroine of the anime, "Kill La Kill." She is an 18-year-old woman, and is the Student Council President of Honnouji Academy. She rules the school with an iron first, and assesses the students' abilities, holding the position/authority to draw out power surpassing that of humans.

Spoiler

She seems to have information regarding the death of Ryuko's father, putting the two at odds immediately after her arrival.

Spoiler

She later states that she was the one to send Harime Nui to kill her father, however that was a lie, as the entire murder was orchestrated by Kiryuuin Ragyou and Harime Nui.

Spoiler

After betraying her mother, she shares the same goal as Ryuuko Matoi.

Spoiler

She is the sister of Ryuuko Matoi.