Can I kill Mydon (tongueless priest)?

The priest who cut out his tongue from the questline "Speak No Evil." I am so grossed out by him and his brainwashed sex slave. I was planning on killing him after I got the information I needed from him but I couldn't go back inside to his room once the cut scene ended. Now I suspect he doesn't exist as an NPC in the game and is just in the cut scene, which would be really frustrating. I wanted to check if anyone knows if he appears anywhere else at any point where I can actually interact with him independently and kill him. :/