Kii

Kii (紀伊) is a student of Tokiwadai Middle School and a member of Shokuhou Misaki's Clique.

Appearance
Kii has brown eyes and long, wavy light-brown hair. Being a Tokiwadai student, she wears the school's uniform.

Background
Kii's background is mostly unknown, but she often works with Mei, the pair being known as the clique's Bumblebee Unit.

Daihasei Festival Arc
Mei and Kii were among members of Shokuhou's clique who were tasked with taking care of Misaka Mikoto, keeping her occupied and restricting her movements, while Shokuhou was away dealing with the situations regarding Misaka 10032 and Kihara Gensei. When Mikoto tried to get away from them by 'accidentally' catching a ride on a train, Mei and Kii quickly caught up to her.

After Mikoto discovered that Kongou Mitsuko had been hospitalized in trying to help her, Mei and Kii met her as she was heading out and tried to get her to wait but were cowed by her anger, with Mikoto telling them to get out of her way unless they were prepared to kill her to stop her.

Jailbreaker Arc
Mei and Kii were tasked by Shokuhou with watching over Dolly as she and Kouzaku Mitori were participating in the Jailbreak Trial, with their memories to be altered afterwards. Having unsubtly aided the two during the event, they were approached and thanked by Kouzaku during post-trial festival. Their purpose wasn't observing the girl who resembles Misaka Mikoto, but they were still curious about the identity of her.

Astral Buddy Arc
After her bag was stolen by a lemur, an exhausted Shokuhou told Kobayashi Satori to take command and not allow it to escape Tokiwadai. Kobayashi ordered other clique members including Kii and Mei to retrieve the clique leader's stolen bag.

Tokiwadai Election Arc
Mei and Kii came to the aid of Shokuhou and Gaouin Tsukasa when they were trapped in Tokiwadai's Building 3 and under remote attack by the other rival presidential candidates in Tokiwadai's Student Council Election.

Abilities
Kii's esper ability is Piercing Wall, which allows her to create walls of nitrogen next to her which can penetrate objects. She can also stand on the nitrogen walls and use them to run through the air. As a student of Tokiwadai Middle School, it can be presumed to be at Level 3 or 4.

Trivia

 * Episode credits refer to her using the term (食蜂派閥), which can be translated as "Shokuhou Clique", instead of her name.
 * After the airing of, Ogino Kentarou confirmed the Voice Artists of the unnamed members of the Shokuhou clique. Ogino referred to Kii by fluffy and soft wave hair (ゆるふわウェーブ).
 * After releasing, Nogi Yasuhito mentioned her nitrogen-related ability and hinted that Kii may be a participant of the Dark May Project.