Shirobana

Sora's confidant and assistant in the school infirmary.
Shirobana is a complex blend of whimsy, jealousy, and a sharp tongue. Nonetheless, she is a sweet girl at heart.

Though deeply fond of Sora, Shirobana tries hard not to show it.
She often resorts to blowing soap bubbles when emotionally cornered as a distraction.

Shirobana is not just an ordinary girl; she is a Tamabito, a spiritual being who can wield mysterious powers known as "Kiseki" (miracle). To perform these miracles, certain offerings must be presented beforehand. With this power, she stands as a bulwark to protect Sora, particularly against threats from other Tamabito or Okuribito.

"Alright, chill out. I'll cool down that hot head of yours with my wind."
"I'm not the lost one here. Sora's the one who wandered off, so it's his fault."
"But... when you meet up with your sister, think you can send her off?"

(Translated from the official website )