There's no way to know for sure who Harry is just from this title. He could be an original character created for the fanfic, or he could be a character borrowed from another work and being used in a new way within this fan - created story.
I'm not sure specifically as it's an odd title. It could potentially be about a character named Harry who is making changes or having an impact on a fan - created story related to something described as 'tight ass'. But without more context, it's really hard to say.
I have no idea who the author of this fanfic is. There are so many fanfic writers out there and without more information, it's impossible to determine.
I'm not sure specifically as I haven't read that particular fanfic. It could potentially be about a character named Harry who is involved in some sort of transformation or reshaping related to an ass, but that's just speculation without more context.
Well, it could be about Naruto using some kind of special jutsu to reshape someone's rear end in a comical or perhaps even strategic way in the context of the fan - created story.
It could be Sasuke. Maybe as part of some strange training or prank, Naruto reshapes Sasuke's ass. It would be a really unexpected and funny scenario considering Sasuke's usually serious demeanor.
It's a rather odd statement. 'Harry' here might refer to a character named Harry in a particular fandom. 'Ruins' implies that he somehow spoils or negatively impacts a 'fanfic' (fan fiction). However, 'tight ass' is an inappropriate and unclear part in this context. It could be a very unorthodox or poorly worded description within the fan - created story.
It could mean that Harry, whoever he is in this context, takes actions that undermine or break apart the 'fanfic'. Maybe he's a character within the story of the fanfic and does something that goes against the plot or the intended message. The 'tight ass' part is a bit unclear, but it might be a creative or colloquial way of characterizing the fanfic as being too rigid or something similar.
Well, 'harry' here might refer to a character named Harry. 'Destroys' could imply that he has a negative impact on or undermines the 'tight ass fanfic'. However, without more context, it's hard to be certain. Maybe in this fanfic, Harry's actions go against the ideas or plotlines that were set up in a rather forceful way.
I don't think it is. Fandom statements usually revolve around praising the fanfic, discussing characters' development, or sharing favorite parts. This phrase sounds more like a very specific and rather negative reaction to a fanfic that is not commonly heard in general fandom chatter. It might be something used in a very niche or private discussion within a small part of a fandom.