Also, I see her being called nicknames like the Umbra Lioness when she gets older.
A little bonus fact, Umbra is a type of black and also a synonym for Dark, it's also used as a force of supernatural power in some Dark Fantasy settings. Umbra is also defined in the dictionary as an Astronomy term for a complete or perfect shadow of an astrological body, and in reference to the supernatural, it's a phantom or shadowy apparition.
So, her getting a nickname with Umbra in it would be more than fitting, it would be able to check off quite a few boxes, and is so rarely used it could serve as something nobility would find tasteful to say, while the more scholarly individuals would see it as an even greater sign of someone to keep on the good side of.
The handsome Duke Voreoti is the most terrifying man in the empire, with the coldest of demeanors and a gaze that can kill. But one day, he suddenly says that he wants to… adopt a child?! And that child is me?! After finding me at a shady orphanage, he whisked me away to his snowy palace without a second thought. Now I’m learning all the ways of the feared Voreoti family from his knights. However, things get dicey when the Duke becomes suspicious of my origins. With these fangs and jet black hair, perhaps we are more than just kindred spirits…