Professor X passed away in the comics due to a powerful attack by a villain who had a vendetta against him. The circumstances were intense and unexpected.
It depends on which specific comic series or storyline you're referring to. In some, Professor X met his demise, but in others, he survived or was brought back to life through various plot devices.
You can start by looking on fanfiction websites like Archive of Our Own (AO3). It has a vast collection of fanfiction, and you can use the search function to specifically look for bottom Professor Snape fanfiction. Just type in relevant keywords.
Professor X's fate varies in the comics. Sometimes he does die, but comic writers often find ways to bring characters back or explore alternate timelines where his survival is possible.
It could be about a student who is being protected by Professor Snape from some dark forces in Hogwarts. Maybe the student has some special power or knowledge that makes them a target, and Snape uses his skills and influence to keep them safe.
No, it is not ethical at all. Rape is a serious and traumatic crime in real life, and depicting it in fanfiction, even in a fictional context, is inappropriate and can be very disturbing to readers. It also goes against basic moral values.
I recommend The Hogwarts Trickster. It's a fantasy-modern magic novel that mainly tells about some strange things happening in the magical world, including Professor Snape tying his hair and Dumbledore confessing to Grindelwald. I hope you like my recommendation.😋