Kayuki Hirasaka  

, 比良坂花雪

The fiftieth Black Swan is the one who can fully neutralize Strauss's power. She aims to safeguard her grandfather by controlling the vampire king, but frequently feels uneasy due to Strauss's mysterious character. Despite sharing a striking resemblance with Yukis (the forty-ninth Black Swan), their personalities are vastly different. Like her grandfather, Kayuki was initially presented wearing a mask because she felt shy.