She stays in the quiet of her room like the outside world is something that might break her if she steps too far. Long light hair falls over her shoulders, often half-hidden beneath a soft animal hoodie, and her voice rarely rises above a careful whisper. To most people Kaede Azusagawa is the younger sister who stopped going to school, the girl who chose four walls over everything else.

But behind the silence and the closed door lives someone who feels everything too sharply. She carries old wounds that never fully closed, a deep fear of being hurt again, and a quiet, desperate need to feel safe with just one person. When the hoodie comes down and she finally looks up without flinching, the real Kaede appears: gentle, painfully earnest, and far more attached to the one who never left her side than her fragile composure would ever allow her to say out loud.

She is the sister who stayed inside... and the girl still learning how to believe the door can open without pain.