Ivy

Ivy is a junior officer of the Scarlett Guard, the Carteretian royal guards that serve as the royal family's personal shields. She's the companion of Magda, and together they were assigned to be Prince Karl's personal bodyguards during the Centennial celebrations.

Ivy is deaf and communicates with others via sign language. She has a flute which she uses when she wants to call attention to herself at a distance or request help. Her fellow guards and Karl communicate in sign language to her as well, even though Ivy can read lips, because they feel it's easier for her to have a visual aid.

Like Magda, Ivy has rudimentary magical skills. It's unclear whether Ivy perished in the University fire alongside with Magda or whether she survived.

During the Centennial Karl is often curt to his bodyguards - word of god explains that the reason why Karl disliked Magda and Ivy is that they were assigned to him after his two male bodyguards were relieved of duty because they were found in bed with him. Lord Alester then decreed that Karl was to have an all-female bodyguard duty. Karl suspects this is not so much to deter him from having sex with his bodyguards, but rather to entice him to start sleeping with women.