Osana Najimi is the first rival and one of the female students who currently attends Akademi.Osana has orange eyes and orange hair tied into twin-tails reaching her knees, with the ends of her hair fading into a light blonde ombré. She has a bust size of 1.15. She's 158.5 cm tall (about 5'2").[4] She wears the default female uniform with salmon pink hair scrunchies gifted by Raibaru Fumetsu,[5] thigh-high stockings, and panties with white polka-dots and a red bow on the left side of her head unless customized. Her phone case is salmon pink with white polka-dots. If her Task is completed, her case will have an orange cat charm hanging off it. If the player has Kyuji Konagawa give her accessories during Matchmaking, Osana will wear a dark red hair clip with a cat face, a dark orange cat-themed bracelet on her left wrist, a black choker with a cat face, and a white cat paw-shaped ring on her right ring finger. If Osana is eliminated peacefully and still attends Akademi, she will appear in subsequent weeks with a shoulder-length bob cut with small twin-tails on the back held by red bows, in reference to her conversation with Taro Yamada on Thursday before school. She also wears a salmon pink ribbon and lobe earrings with white polka-dots.In Mission Mode, Osana is a Loner. If she witnesses a murder or sees a corpse, she will flee school and call the police. Her reaction to Ayano's phone is the same as in Story Mode. Osana is based off the tsundere character trope found in Japanese anime and manga. She acts hostile and irritable towards Taro to conceal her romantic feelings for him, although her true personality appears to be kind and friendly as she acts as such towards other students. She tends to softly speak of her affections in between her aggressive outbursts towards him, and also frequently expresses her kinder side during her events. Although this side is commonly seen with Taro, it also pops up in other situations, like if she got an answer wrong in a conversation.[6] Additionally, she only uses profanity when she is angry.[7] Osana's embarrassing secret is that she used to write fan-fictions where she romances boys from her favorite anime. According to Kokoro Momoiro, her username was "The Ginger Ninja" on fansmut.jp. She is implied to be self-conscious and worrisome, as she often speaks to Raibaru on the topic of romantically pursuing Taro, unsure of whether or not she has been too desperate or harsh with him. However, Osana will willingly follow Ayano if she has a high reputation, even if Ayano has only spoken with her to complete her task. Although this behavior suggests that Osana easily believes her fellow students, it can be considered unusual that she exhibits gullibility despite her implications of issues with trust. For these same reasons, it is also unknown why Osana can become good friends with Raibaru even though they only met last school year. While her hot-tempered and abrasive behavior is exclusively towards Taro due to her feelings for him, she can occasionally act "tsundere" towards others in other scenarios, such as getting a question wrong in casual conversation and trying to hide her embarrassment with a defensive response, even if her intention isn't to hurt anyone's feelings. Depending on Kiyuji's response during the Matchmaking, she will reveal to him that she is concerned about the impression she makes on people. Despite all this, she is a friendly person under normal circumstances, and she rarely loses her temper.[8] She also has slightly above strength, as she can kick a vending machine (if the machine is tampered with), attempt to restrain the killer who murdered Raibaru, and be helpful with her fighting ability in a zombie apocalypse.[9] Osana appears to be a popular student due to her high reputation. She is close friends with Raibaru and is seen sunbathing with the Bullies. She states during her confession that many boys ask her out, suggesting that she is also considered attractive.

Osana Najimi:Sitting down eating her lunch on the roof