Akira Asai

Akira Asai (アキラ) is a side character in Call of the Night. She's the childhood friend of Kou Yamori and Mahiru Seki and also lives in the same apartment complex as Kou.

Appearance
She has short, black hair (dark brown in the anime), eyes with tiny pupils and no visible iris, a noticeable upper bust (a feature that gets acknowledged by several characters), and an angular face. When she is outside, she usually wears a school uniform, consisting of a long-sleeved white shirt, a striped tie, and a skirt. At home she is always shown wearing a sleeveless shirt and pajama shorts.

In chapter 106 she was put in a maid outfit, much to her embarrassment.

Personality
Akira is a disciplined student who obediently follows her school duties, despite not having fun at all. She is friendly and maintains a close relationship with her friends Kou Yamori and Mahiru Seki and often lets them get her into trouble. As a little girl she was very lively and talkative but later became gloomy and blunt, likely because of her boring time at school, where she puts on a false honor student persona to control her life better and has trouble catching up with the girls because she preferred to spend her time with boys before, and her situation at home, where she doesn't seem to have a good relationship with her family and does nothing but do the same routine every day. She gets grossed out when someone says something too positive, like Kou praising Mahiru or Mahiru talking about "liking someone".

Even though she had no problem socializing with others, it quickly got boring for her until she met the two boys, with whom she shared several traits, like the way she viewed things or her inability to relate to other people. She has a relatively carefree attitude, quickly accepting the existence of vampires. She has a strong suspicion of vampires and doesn't want much to do with them, getting embarrassed by them and weirded and grossed out by their antics.

Kou Yamori
Akira and Kou have been friends since they were children. She would frequently talk to him and try to have a conversation with mediocre success because of Kou's limited social skills. She felt a connection with him because of their similarities and is very attached to Kou, whom she sees as a little brother. To make sure he doesn't stray away from everyone else when they were little, she often watched over him. After entering 6th grade, they stopped seeing each other but Akira hoped that he would call her, later saying that school would be more fun with him around. When they met again she was glad to learn he was doing well. She talks to him very casually and is not afraid to call him out on his behavior, questioning his intelligence. Despite wanting him to return to school, Akira doesn't mind the life, Kou is living and wants the best for Kou and to see him happy, supporting him actively on his journey to becoming a vampire despite not feeling very comfortable around them and almost getting killed by one. She wants to let Kou suck her blood once he becomes a vampire so he doesn't have to starve and lose his mind as a result.

Mahiru Seki
She knew Mahiru since early childhood and could see that Mahiru's smile and cheerful attitude were fake, witnessing him being genuine for the first time when talking with Kou. Mahiru was the first of the two to have a proper conversation with Kou, which caused Akira to feel jealous of him. The three had a unique connection because of the similarities they shared. Akira thinks of Mahiru as intelligent and cares a lot about his well being, noticing that he is not truly being himself after he joins Kiku and wants him and Kou to make up, stating that they were unlikely to find friends like each other anytime soon. Despite all that happened, she was able to carry a conversation with him but quickly became angry at him for asking her to deliver his farewell message to Kou, yelling at him to do it himself.

Nazuna Nanakusa
Akira's first introduction to Nazuna was Nazuna spaying on her and Kou as they met in a park, where she barged in and didn't hesitate to reveal sensitive information to Akira, like "only being interested in Kou's body", even insisting on it when Akira thought they were just friends. Akira quickly (and unintentionally) embarrassed Nazuna by mentioning Kou liking Nazuna romantically and was shocked when she sucked Kou's blood in front of her. Because of that and Nazuna's personality, Akira looked down on her and didn't try to hide it, calling her names to her face or within her earshot.

Sakura Asakura
Akira and Sakura were not very close but talked to each other occasionally, with Akira being fond of her exceptionally kind personality and thinking of Sakura as cute-looking. She encouraged Sakura to ask Kou out, believing that Sakura would easily get a "yes". After she got rejected and Kou got harassed by other girls because of that, Akira felt guilty, believing she hurt both of them. She wanted to apologize but believed that an apology would only bother them more, unable to move. After that she found it difficult to talk to Sakura, even if Sakura harbored no ill will. After asking Akira to be in the same school-trip group as her and Kou, Akira was baffled by how friendly Sakura was, making a comment about wanting to go out with her.

Quotes

 * (To Nazuna) "Please shut up, monster:" -Chapter 7
 * (To Kou) "Look, I don't care about who you fall in love with and who you go out with. I'll support you anyways. But man, if you go for this slutty monster, you're making this hard for me..." -Chapter 10
 * (To Mahiru) "You worry and worry and pretend to worry, but you've already made up your mind." -Chapter 50
 * (To Sakura) "What a nice girl...I wanna go out with you..." -Chapter 131