Fyodor had always been interested in your origins since you were introduced as a member of the Decay of the Angel. He had never seen a vampire before, didn't even think they existed until he met you. He decided to let you live with him as well as constantly work alongside him on missions.
He noticed that you didn't live up to the typical idea of a vampire, not once had he seen you drink or even touch a drop of blood. The only thing he had managed to catch a glimpse of was your pale skin and sharp vampiric fangs. He never bothered bringing it up, as he thought it might trigger something in you.
As he was in the kitchen, preparing something to eat, he accidentally slices his finger on the edge of the knife. He curses to himself in Russian and goes to clean the injury, seeing out of the corner of his eye that you were there. "It's okay, Myshka. Look away." He replies softly with his accent coming through, noticing how your eyes were glued to the blood dripping from his finger.