Osuna Tobiichi

Osuna Tobiichi is the main protagonist of the Kizuna series and the most frequent narrator. She is a first year high school student who survived a vampire attack during spring break, and barely regained her human life in the time that followed. Since then, she's been affiliated with Natiko Kenyura, the vampire that had attacked her, and continues to feed Natiko her blood. As such, she's still not entirely human and certain vampire traits remain, such as regeneration.

Osuna is the narrator of all First Season and Final Season arcs as well as three from Second Season. She is the titular protagonist of two main arcs: Osuna Vamp and Osuna Reverse. She is also the titular protagonist of one minor arc: Osuna History.

Referrals/Nicknames

 * Osuna (阿良々木) - Keigo Tobiichi, Matriarch Tobiichi, Imada Nishio, Mizuno Katsuro
 * Osuna-dono (阿良々木殿) - Emiko Yamaguchi
 * Osuna-chan (阿良々木くん) - Yoru Toraburu, Imada Nishio, Miya Setsuko, Ayako Kotone
 * Osuna-san (阿良々木さん) - Takima Nakani, Juno Shisu
 * Osasuna-san (阿良々々木さん or アラララギさん) - Juno Shisu
 * Tobiichi-senpai (阿良々木先輩) - Mukade Takusa, Kouta Shinohara
 * Boku (僕) - Osuna Tobiichi
 * Geboku (下僕) - Natiko Kenyura
 * Kichiku na Onii-yan (鬼畜なお兄やん) - Miya Setsuko
 * Tobiichi (暦) - Matriarch Tobiichi, Kouta Shinohara, Keigo Tobiichi
 * Tobiin (コヨミン) - Izuko Gaen
 * Osu Osu (コヨコヨ) - Imada Nishio
 * Tobiichi-onee-chan (暦お兄ちゃん) - Himari Nishio
 * Nee-chan (兄ちゃん) - Himari Nishio
 * Onee-chan (お兄ちゃん) - Mukade Takusa
 * Tobi-chan (鬼いちゃん) - Juno Shisu
 * Oni-no-Onee-chan (鬼のお兄ちゃん) - Kenda Arama
 * Omae-sama (お前様) - Natiko Kenyura
 * Thrall of Natiko - Mukade Takusa, Kouta Shinohara, Yoru Toraburu
 * Waga aruji-sama (吾主様) - Natiko Kenyura
 * Yokoyoko (ヨコヨコ) - Imada Nishio

Appearance
In the adaptations that depict her, Osuna is shown to be a young woman with orange hair, grey eyes, and a medium complexion. She's 5'8, and she wears a pair of eyeglasses. Her hair commonly has a white bow tied to the side, which was given to her by Imada Nishio. In Kizunagou, Osuna has her hair to her shoulders. After Osuna Vamp, she decides he should grow out her hair more to hide the bite marks on her neck. While it doesn't always seem entirely consistent, her hair does generally seem to get longer over the course of the chronological order in the anime adaptation, with Kizunanui featuring her hair barely passing her shoulders, Kizunanoki 2 with slightly longer hair, and Owari no Kizuna with considerably long hair.

If not wearing her school uniform, she dresses casually, often clad in a hoodie and jeans. As noted by her cousin Keigo, her fashion sense is far from admirable. A notable feature is the mole on the right, bottom side of her lip.

She's quite physically fit as a result of becoming a vampire, though it's normally only noticeable when she doesn't wear a shirt.

Personality
Osuna is a laid-back individual. Prior to her experience during her last spring break where she met Imada Nishio, she was rather asocial in high school, claiming that having friends would "lower her integrity as a human," due to a negative experience during her first year. This ideology seems to have multiple implications, as her explanations seem to change slightly in different instances. In Osuna Vamp, she describes it as an idea that being close to others could ultimately harm her. If her friends got hurt, she would also be hurt. It gives a person more weak points. In Ayako Formula, which describes the scenario that birthed this expression, explains it in a slightly different way. Instead, it shows how she found disturbance in the fact that a "truth" can be made just by numbers. Something doesn't have to actually be true, but if a majority of people say it is, it's treated as such. She has her own sense of what's right, and doesn't want to be a part of the "majority rule" in deciding justice. In either instance, both explanations support isolation and the idea that she would be stronger as a person if she was alone.

Background
Osuna is the only child of Matriarch Tobiichi. Matriarch tends to be away from home for long hours since she works as a police officer, likely the cause for the sense of justice Osuna shares. Prior to when the series takes place, Osuna spent most of her high school life as an outcast and mostly failed student, only ever being good at math due to being tutored by Ayako Kotone when she was younger. After a certain situation, she decided she didn't need friends, as they would "lower her integrity as a human."

Over the spring break, she was attacked by a vampire and became a vampire herself. Although Mizuno Katsuro helped her become more or less human again, there are several lingering side-effects such as enhanced vision, superhuman strength, and regeneration. She remains scared of morning sunlight, though it no longer affects her. During this same event, she also met Imada Nishio, who changed her perception on making friends.

In her third year of high school, she becomes Imada's class vice president on account of her wanting Osuna to "turn her life around." This makes the two of them responsible for planning events and dealing with other class affairs.

Quotes
(To Mukade Takusa'') “But being optimistic isn’t a bad thing, is it? It’s not like you’re doing anything bad. It’s also not like you’re cheating either.”''

(To Himari Nishio) ''“Come on. I don’t like this trend of explaining anything and everything about my love life. It’s impossible for me to choose between your sister or Takusa-kun.”''