Sora Kasugano is one of the main characters in the anime series 'Yosuga no Sora'. She is portrayed as a delicate and fragile girl with a deep emotional dependency on her twin brother, Haruka. Physically weak due to her poor health, Sora is often seen relying on Haruka for support. Despite her shy and reserved nature, she harbors a strong attachment to him. Throughout the series, her complex relationship with Haruka is explored, highlighting themes of love, dependence, and the challenges of familial bonds.