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 series of stories. A five episode anime OVA series was adapted from the manga^[1] by Mushi Production and released in 1989.^[2] The OAV series was licensed and released on VHS and LaserDisc in North America by Central Park Media in 1990.^[3] A dubbed version was released on VHS by Manga Entertainment in 1997.

Lan Komatsuzaki (小松崎 蘭, Komatsuzaki Ran)

Voiced by: Waka Kanda

Lan was in a plane crash with her parents just after she was born, and she was raised by wolves for five years. She possess the latent esper abilities which identify her as the "Crimson Fang".

Sonnet Barge (ソネット·バージ, Sonetto Bāji)

Voiced by: Hiromi Tsuru

Sonnet is a 16-year-old esper cyborg soldier with silver hair (though it is blue in the OAV) who works as a scout for Talon. Her mother is Puerto Rican and her father is Russian, and she was raised in the slums of New York. When she was about 13 years old, her latent esper abilities began randomly manifesting themselves, causing people to label her a "witch" or a "devil child", and this caused her mother to have to turn to prostitution for money.

She was tricked into believing her mother was going to be killed, which caused her latent esper powers to fully manifest. Because of this, she now works as a scout for Talon, mercilessly hunting down espers such as Lan. Her interaction and blooming friendship with Lan and others at the school, however, have caused her to remember her humanity and she begins to question her loyalties to Talon.^[1] She finally learns from Lan's boyfriend Bird what real love is.

Dr. Josef Merekes (ヨゼフ・メレケス, Yosefu Merekesu)

Voiced by: Ichirō Nagai

Dr. Merekes, a German scientist of Jewish descent, manages the cyborg division of Talon. He is a recognized authority in cybernetic engineering, and is the one responsible for Sonnet's and Bird's cyborg capabilities. While he is generally a cool-headed person, his growing parental love for Sonnet is his eventual undoing.

Wataru Komatsuzaki (小松崎 亘, Komatsuzaki Wataru)

Voiced by: Nozomu Sasaki

A first year student at Seiryō Academy who looked up to Bird. He feels responsible for Ran's injuries, and thinks that her powers are caused in part by the blood transfusion she received. He is always helping her.

Jin Kiryuu (桐生 仁, Kiryū Jin)

Voiced by: Tesshō Genda

Jin is a novelist. After learning about Talon after being involved in an incident with Lan, he supports her however he can.

Shuuichi Torigai (鳥飼修一, Torigai Shūichi)

Voiced by: Masashi Hironaka

Often nicknamed Bird, he is a delinquent offered room and board at Seiryō Academy in exchange for working there in the dining hall. He was good friends with Lan, but Talon kills him. They then take his remains and turn him into the cyborg RX-606, and he seeks out Lan again.

Yuri Onagara (小半由里, Onagara Yuri)

Voiced by: Emi Shinohara

The daughter of Professor Onagara and a powerful esper whose abilities include clairvoyance, telepathy, and precognition. Due to a fiery incident in her past, she is unable to see, hear, or speak due to the burns she received. She is currently an ally of Lan and intent on attacking Talon.

Daisuke Kishima (杵島大介, Kishima Daisuke)

Voiced by: Nobuo Tobita

Daisuke is the son of Jin Kiryuu and a student at Ōsei Academy.

Naru Haibara (榛原奈留, Haibara Naru)

Voiced by: Rei Sakuma

A student at Ōsei Academy. She works in the library and is Lan's best friend. She's been raised as a foster daughter by the Haibara family. She has a crush on Daisuke.

The opening credits for each episode show Sonnet's former life and give hints about her powers. In the battle between the two powerful espers, Sonnet starts to rediscover her humanity, while Lan has to fight to keep her humanity, and control the Crimson Fang powers.

Sources:^[1][3][4]

• Director: Takeyuki Kanda
• Creator: Masahiro Shibata
• Screenplays: Seiji Matsuoka, Kōichi Mizuide
• Producer: Yukihiro Shino
• Character Designs: Katsuichi Nakayama
• Mechanical Designs: Masahito Yamashita
• Storyboards: Yūichirō Yokoyama
• Production: Mushi Productions
• Production Cooperation: Tatsunoko Production

Sources:^[5]

The OVA series has been described as "a visual delight" which "harkens back to a simpler age, when the important thing was that the characters looked cute and the action looked cool", even though the "plot fits together, but only barely".^[3] While based on shōjo manga, the series contains intense and graphic violence, which is not typical for most shōjo works.^[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.^[4]