Yunju Yuyuliu, former Cloud Hashira of the Demon Slayer Corps.
At eleven, she stood outside the orphanage where she'd lived for five years. "I lost my shoes when I lured the monster away. Could I have a pair?" In the end, she left alone in the snowstorm.
At fifteen, she ran while chanting, "I won't be a Hashira, I won't be a Hashira, I won't be a Hashira." A flame-colored owl in its thirties caught her and gave her a beating, but she still ended up staying with the Demon Slayer Corps.
At sixteen, she dangled upside down from a tree. "I'm here to steal a kid!" Then she scooped up the girl wearing two butterfly hairpins who was following the Stone Hashira, and ran off at top speed.
Then she became a demon and stayed at Mount Fujikasane.
Bored out of her mind at Mount Fujikasane, Yunju Yuyuliu built herself a shrine and became an expert at eliminating urban legends. Looking at the terrified members of the Final Selection, she said, "Sit down, everyone. This is standard procedure."
Serious story.
The pairing hasn't been decided, but there will definitely be one.
Theme: Those born with two wings will one day soar far across the rainbow