Sena Akagi is a supporting character in Ore no Imouto ga Konna ni Kawaii Wake ga Nai (Oreimo). She is a close friend and fellow otaku of the protagonist’s sister, Kirino Kosaka, and is known for her cheerful, energetic personality and strong interest in anime and games. Sena often appears as part of Kirino’s social circle, helping to highlight the everyday friendships and otaku culture that shape the series’ comedic and slice-of-life side stories.