Also known as: 流木野サキ
One of the main characters of Kakumeiki Valvrave and the main protagonist of the spin-off manga Kakumeiki Valvrave: Ryuusei no Valkyrie.
A popular idol who has grown aloof due to her career being on hold. It is hinted that she has romantic feelings for Haruto but keeps them to herself knowing of his feelings for Shouko . She is one of the few people who knows about Haruto's power. She and Haruto discover the other Valvrave models hidden in Module 77. Saki enters the cockpit and becomes the pilot of Valvrave IV (coded VVVIV), to which she names "Carmilla", as well as being injected with the same substance as Haruto thus gaining the same powers as him (like transferring to another body).
Saki is a beautiful pale-skinned young girl with silky back-length Black Hair and violet eyes. She wears the traditional Sakimori Academy uniform which she pairs with black knee-high socks and light brown boots. In an angle, she wears a white Hair Ornament.
Voiced by Tomatsu Haruka.