Kasugano Sora is one of the main characters in the anime Yosuga no Sora. She is the twin sister of Kasugano Haruka and plays a crucial role in the story, especially in the route focused on her. Sora is known for being quiet, shy, and highly dependent on her twin brother. Although she often appears cold and reserved, beneath her fragile demeanor lies a deep sense of love and dependence on Haruka. After losing their parents in an accident, Sora and Haruka move to the countryside to live in their grandfather's old house. However, even though their new environment is supposed to bring them peace, Sora's life remains filled with loneliness and a sense of loss. Unlike Haruka, who is able to adapt and build relationships with others, Sora chooses to stay at home, spending her time on the internet and with her beloved stuffed rabbit. She often displays jealousy toward those who get close to Haruka, indicating how afraid she is of losing the only person left in her life. In her own route, the relationship between Sora and Haruka develops into something controversial and deeply emotional. The anime explores themes of forbidden love and intense emotional dependence between the two. Inner conflict, guilt, and societal pressure are central to Sora’s emotional journey throughout the story. In terms of character design, Sora has long silver hair adorned with her signature black ribbon. Her gray eyes reflect her personality, often appearing cold and filled with sadness. Her delicate appearance and melancholic expressions make her highly appealing to many anime fans, especially those who appreciate kuudere or dandere characters. As a complex character, Sora evokes a lot of emotions from viewers. Her reserved personality and intense relationship with Haruka make her one of the most memorable characters in Yosuga no Sora. Whether her story is seen as tragic or romantic depends on one’s perspective, but one thing is certain—Kasugano Sora is a character that is hard to forget.