Crimson Fang Blue Sonnet (Japanese: 紅い牙 ブルーソネット, Hepburn: Akai Kiba Burū Sonetto) is a 19-volume manga series by Masahiro Shibata [ja] which ran in Hana to Yume magazine from 1981 to 1987 as part of the Akai Kiba [ja] series of stories.

[2] The OAV series was licensed and released on VHS and LaserDisc in North America by Central Park Media in 1990.

Sonnet goes undercover as a regular high school student and makes friends with Lan Komatsuzaki and Naru Haibara almost immediately.

She immediately becomes very popular due to her looks as well as her talents such as playing the piano, her math skills, and her physical prowess.

Her latent powers strongly manifest themselves and she deflects the car away from the crowd, but Wataru is badly cut by flying debris.

Jin is investigating the Azumi Group, and learns they might be working in genetic engineering as well, and they recently opened a new facility.

Dr. Merikus meets with the Azumi Group board where they tell him that Talon wants the Crimson Fang dealt with quickly.

Merikus, posing as her family doctor, arrives at the school to examine her in order to determine what caused the collapse.

[4] The anime is considered "a little bit better than average, though it "doesn't feel finished", but it is "better than the vast majority of 'magical warrior'" series.