Asuna Kagurazaka (神楽坂 明日菜 Kagurazaka Asuna) is a character from the Mahou Sensei Negima! manga and anime series. She is student number eight in the class, and the lead female character. In the first season, the OADs and the manga, she has heterochromia (in the second season and early OVA's both eyes are of the same color) and appears to be 14 or 15 years old, but her exact age is unknown, as her name was mentioned in a video that occurred 21 years ago. She is very short-tempered and quick to resort to violence (especially towards Negi), though she is very protective of those close to her. Asuna has a crush on her former home room teacher, Takahata, and she spends a significant amount of time attempting to become closer to him. She bonds with Negi after he becomes her teacher, though she is initially wary of him.
It is later revealed to Evangeline and Negi that she is actually Asuna Vesperina Theotanasia Entheofushia, a princess of the fallen country of Vespertatia (whose capital used to be the ruined city of Ostia), who was saved by Nagi and his group. She occasionally has dreams regarding her past, but cannot recall them at will due to Takahata erasing her memory. Negi states that she has the same look and smell as Nekane Springfield. She also has the natural ability to cancel magic, which is an exceedingly rare ability. A number of Asuna's character traits and design are inspired by Naru Narusegawa from Love Hina, Ken Akamatsu's previous work, including her attraction to an older man, and violent personality towards the protagonist. While she claims to hate children, she is easily the closest in the class to Negi, which leads a number of her classmates believe the relationship is romantic, a claim that she repeatedly denies. Although she denies having feelings for Negi, it has been hinted throughout the story that she harbors some form of love towards him, even though it may be brotherly or romantic, it has not been explicitly expressed.
After forming a pactio with Negi, she gains the artifact "Ensis Exorcizans", which can take the form of either a harisen or a massive sword, which enhances her natural ability to cancel magic. Initially, she can only summon the harisen on command, however she is later able to call upon both at will. She also has a degree of mastery over Kankahō (咸卦法 also, xiánguàfǎ?), a strong combination of magic and ki which enhances all of her abilities. Although her memories are erased by Takahata, they are restored by Fate.
She is somehow related to Negi Springfield (Although Cousin/Aunt fit well as Asuna's older sister is Neji's mother), though the specifics of this relation are unknown, and she is the only relative of Negi's that lives in Japan. She became Negi's guardian before she knew their familial bond. It is implied that her real age is around 25 years old, however she is about 15 years old in both civil registration and physical appearance. That makes her one of the look-younger-than-her-real-age girls in Negi's class (the others are Evangeline A.K. McDowell, the twins and the ghost.)
Recently, Asuna was put into a hundred-year sleep; however, she overslept by thirty years, and in this time most of the people that she knew in her class have died, with the exceptions of Evangeline and Chao Lingshen, who, for personal reasons, decided to bring her back to the past shortly after she "left" for hibernation, allowing her to graduate with the rest of her class and remain at Mahora.
In the anime, Asuna is the Red Baka Ranger (known as the Dummy Force in the English anime), a group widely accepted as the most unintelligent in the class. However, the Baka Rangers are seen as capable of performing great feats either by luck or by strong physical prowess.