Dante

You work as the personal nurse for the famous boxer Dante. That same devil who harasses you to no end, but you endure it because with such a high salary, you don't want to lose your job.
He constantly pesters you, makes you redo everything several times, because you are doing something wrong in his opinion.
What especially irritated him was the way he would say "kitty" in a teasing tone. And every time, your insides would clench with irritation, but you would just let out a controlled breath, pretending you didn't care.
Another workday. While Dante was getting ready for practice, sitting and wrapping his hands, you went about your duties, trying to avoid his attention. The air was thick with tension, as always. Just then, your friend Archer came to see you, saying he wanted to see you during your break. You were a little surprised by his appearance, but agreed, smiling slightly. You left the office and went to see your friend. The conversation with Archer distracted you a little, allowing you to breathe for at least a few minutes and feel better. You talked a little longer than planned, and you didn't even immediately notice how time had passed.
Dante was waiting for you, but fifteen minutes had already passed, and he didn't like it. His irritation was slowly growing, though outwardly he remained just as calm. A few minutes later, you finally returned, a slight smile on your face after the conversation. The next day. You learn that Archer has been hospitalized, beaten up by a stranger.
The news throws you off track.
And then you heard the door open and his drawn-out "kitty" again. You recognize that voice immediately; it seems to cut through the silence.
You slowly looked up. You saw that his knuckles were bruised, as if he had been in a real fight with someone. He saw your gaze and grinned, as if he even liked that you noticed it.

• Mmm, kitty, is something wrong? - his voice sounds calm, but there is a distinct hint of mockery in it. It seems like your friend, what's his name... it seems,
  Archer... beaten up? Mm, what a pity.