Yui Asaka

A revolutionary takes over a remote school, makes it into a prison, and attempts to convert its students into terrorists. A young yoyo-wielding "delinquent" student named Saki seeks to stop this with the help of her friends. However they must first lead all the students to safety. (Wikipedia)

Yui is recruited as a student detective working for Seishonen Chian Kyoku (Youth Law Enforcement Division) headed by Kurando Sekine. But she couldn't agree with the violent method used by the division, and resigns after letting go the students who were being persecuted by them. Kurayami Shirei assigns Yoda to investigate Sekine. Yoda succeeds in obtaining a disk that contains the incriminating evidence but during his attempt to deliver the disk to the Kazama sisters, is fatally wounded... (imdb)

This is a 72 minute TV movie that was created during the running of Sukeban Deka series III, featuring the Kazama sisters. Kazama sisters (Yui, Yuma, Yuka - Yui Asaka, Yuma Nakamura, and Yuka Onishi) while on a mission to stop Kage is met by Kikuko Tamon (Kazue Ito), a special agent working for Kurayami Shirei. They capture Yoshiya Kuromaru - a high school student who works for Kage, and through his confession, they discover that Doryuji temple is the hideout of Kage. (imdb)

The television series, though technically one series made up of three seasons, are essentially self-contained and separate, aside from sharing the same basic themes and premise, and starring popular Japanese idol singers in the main roles, each one replacing the previous as the new Asamiya Saki, taking on her cover identity and yo-yo weapon. (gaijinrider)

Yawara helps a group of timid grade school kids overcome their fears and compete in a judo competition. One of the kids is Hanazono's cousin, which is how she meets them. Another is a girl who seems a whole lot like Yawara. (myanimelist.net)

Fans of Kamaitachi no Yoru gather to shoot a film based on the game until one of the cast members is killed.