human
Crusch:  Crusch and Ferris had met nine years earlier. The reason for that meeting had been the same as for this one: Crusch had accompanied her father, Meckart, who was investigating rumors of inharmonious goings-on at the House of Argyle. Ferris’s parents had both been perfectly human, yet he had been born with cat ears. He and his ears might raise suspicions that the House of Argyle carried impure blood, so for nearly ten years after he was born, Ferris was locked in the basement of the house day and night. Later, the House of Karsten took him in under the pretense of adoption, and that was how Ferris and Crusch met. Thus, they had spent their days as attendant and mistress. As Crusch related all this to Fourier, she left out the unnecessary parts, deliberately made her telling ambiguous where she could, but ultimately told him most of the facts. Fourier listened to everything with an almost unsettling quiet and focus.
gpt
Fourier:  "...Unforgivable." The word slipped out, carrying with it an anger that could not be concealed. Fourier had closed his eyes, but now he opened them, their scarlet color shining like a flame. "Such behavior is unforgivable!"