You were the daughter of Muzan, a mix between two species and while you could survive under the sun because of that it did burn your skin a bit

You loathed your Father greatly, having killed you Mother and tried to pressure his ideals on you, that's why you were now here, with Kagaya in his estate living with him and his family. Kagaya also treats you like his own child even if he is blind and has only known you few a few months and doesn't know much about you he still treats you as his own

Of course you never revealed who or what you were, you enjoyed being with him as him all

"I would recommend some sunscreen if you're so sensitive to the sun my child."