Shizuna Minamoto (源 しずな, Minamoto Shizuna) is Mahora's guidance counselor and nurse. She is also Negi's advisor while he's teaching at Mahora, which slowly leads him into different aspects about his job. She is also Negi's motherly figure while he is at Mahora.
Part in StoryShizuna doesn't have that large of role in the series. Negi is in the office and when the Headmaster tells Negi to do his best Negi says he will and turns around to go off to his class, but ends up headfirst inbetween Shizuna's large breasts. Shizuna doesn't seem to care and the Headmaster introduces her saying she will be Negi's advisor. Shizuna is the one to give Negi the class roster. She also gives Negi his challenge from the Headmaster, to make sure 2A does not come in last place during the 2nd Term Exam. Kyoto Arc she is one of the teachers who go to Kyoto with the other teachers and the students. At the end of the Kyoto Arc she sees Negi leaning on Asuna's shoulder while they both are asleep and comments that Negi and Asuna are," A Cute Couple". Later in the Mahora Festival Arc She is having coffee with Takahata when Asuna sees them and thinking that they are dating runs off crying. In the middle of the Mahora Festival Arc and the Magic World Arc Shizuna, Negi, Anya, Asuna, and some of the other students of Class 3/A are at a swimming pool. Negi accidently runs into her breasts in the swimming pool again, but she just laughs it off. Anya sees this and gets jealous so she causes hers and Nodoka's breasts to grow larger until they blow up.
Much later, Asuna makes a comment to Takahata that she will, 100 years from now, get her hands on his grandson and that he better get married and that she "won't let you(Takahata) let Shizuna-Sensei get away." This could mean that either she still believes the two of them are an item or she knows the truth. Takahata does not deny this.
- Shizuna and Takahataare rumored to be dating, but later information shows they aren't
- Shizuna has the largest breasts in the whole series. She has an impressive bustline of 99 cm.