Yuuma Tokoyogi

is a childhood friend of Kojou Akatsuki and Nagisa Akatsuki. On the night before Halloween Fiesta, she hinted to Kojou that she wasn't human, and soon after, she kissed his lips, causing their bodies to swap. She is revealed by Dimitrie Vatler to be the daughter of Aya Tokoyogi and took Kojou's body in order to free her mother who was imprisoned in the Demon District Prison Barrier. She became the fourth blood partner of Kojou.

Background
Yuuma first met Kojou Akatsuki and Nagisa Akatsuki when he was trying to retrieve Nagisa's hat stuck on a branch off the edge of a cliff. Kojou decided to look in the regular spot where Yuuma hid and watched them everyday; he asked her for her help. She quickly grabbed his hand and dragged him over to the cliff. By working together they got Nagisa's hat back. However, after they doing so Kojou fell off the cliff only to be saved by Yuuma; he thanked her and said that she's pretty strong. Soon after they introduced themselves.

She is a clone that was forced to grow by parthenogenesis. Later, she became a witch and broke the Demon Prison Barrier; both of which were instructions programmed into her by Aya Tokoyogi (Yuuma's "mother"). Yuuma told Kojou that there was nothing she could call that was hers, except the fact she met Kojou.

Personality
Yuuma is a very caring girl, with traces of playful attitudes implying her mischievous nature. She looks independent on the outside, but is actually desperately searching for a purpose in her existence, which causes her to break up Prison Barrier's security to release the criminal Aya Tokoyogi despite her kind nature, lest losing her raison d'etre.

Appearance
Yuuma has been portrayed as a very attractive and even beautiful girl,with short brown hair that has long bangs obscuring most of her forehead with a center bang covering the center of her face and purple eyes.

She dresses like a tomboy.

Abilities

 * Body Switching: Tokoyogi is capable of switching bodies with another living person. She can do this through direct contact with the other person.
 * Le Bleu: Tokoyogi's guardian. It is shaped like a knight with blue armour and hazy purple limbs. While it's abilities are unclear, it is capable of distorting space-time.
 * Teleportation

Trivia

 * Yuuma is voiced by Yumi Uchiyama in the anime adaptation of Strike the Blood
 * She shares a voice actor with: Mayumi Kisaki (The Devil is a Part-Timer!), Erika Chiba (The Irregular at Magic High School), Mizuki (Netoge), Setsugetsuka Tennouji (Nogizaka Haruka no Himitsu), Kaori Minato (Ro-Kyu-Bu!), Yayoi Honjou (The Pet Girl of Sakurasou), Kana Fujisawa [Sophie] (Sword Art Online Alternative: Gun Gale Online).