Won’t really affect my mc cause…
My mc would simply choose to avoid that room, or likely increasingly avoided it more and more as he got more and more hideous and bullied himself and would have stopped at least some years ago by the present-day.
Since he’s apparently got to live with the Night-Coven later on the possibility that he’d even think of visiting again would be slim to none too.
Yeah, this could be more of a case of “nice to have” but I don’t really see it deeply affecting the story unless the plan is for dear old dad to wake up again in one of the later chapters or installments of the series.
Still since our aunt didn’t tell us about the witch-thing ever my mc would also increasingly begin to doubt the pretty-boy she keeps “on ice” really is his dad, instead of just her comatose lover.
Like I said my mc would probably have stopped visiting the guy by the time he was 11-12 at the latest.
If my mc ever felt better around the guy at all he’s likely attributing it to more scientific measures as he starts to get older.
For example if his aunt literally keeps the guy on ice or at least in a fairly cold and carefully temperature controlled environment it should be a fairly logical conclusion to make that it is cold instead of magic that helps him, particularly since in the real world forms of cryo-therapy are being researched to help deal with alleviating the pain and symptoms of migraines, cluster-headaches and certain forms of cancer, including the bone-affecting leukemia.
At least for the uninitiated yet fairly intelligent, like my mc hopefully used to be, “magic” is not an obvious conclusion to draw, nor is the comforting effect of “divine intervention” for someone like my mc who probably doesn’t believe in a god or religion either.