I had a Judi Dench OC too! I killed her off in that mass OC slaughter epic, but she was one of the few who died of old age. She was an arts professor. I need to write more about her though. She lived for 93 years and I introduced her when she was already past 90, so there's a lot of backstory to write. I've come to hate content warnings as spoilers that ruin my experience as a reader. I read here on the boards a story that spoke of someone who had committed suicide; the story wasn't about the actual act of suicide but about the emotional fallout for a parent. It was wonderfully written with a lot of finesse and subtlety and I wish I hadn't read the content warning so that I would discover through the writing what had happened. More generally I feel that specific content warnings for anything that happens off stage aren't necessary. I use them only when I know that the reader will actually witness death or violence in the chapter; otherwise a general comment in the story's intro blurb is enough (e.g. "PG-13 for references to drug use").