Naginny

So the name Nagini made me think of Ginny and like, what if she encountered Nagini somewhere on the grounds of Hogwarts but she didnt know what she really was? And Nagini knew that Ginny was already in possession of the diary and did not harm her. So being the brave Ginny that she is, she got close to the python and noticed how harmless calm she was.

Over the next weeks, Ginny paid visits to her around the forbidden forest but little did she know that the soul fragment of Tom Riddle in the diary somehow communicated with the soul fragment in Nagini and while Ginny was tranced by the diary, Nagini was helping her kill off those chickens to write the “enemies of the heir” thing. Nagini also helps her open the Chamber of Secrets (Or could have been the one to first open it for her?).

I also thought of Ginny being influenced by being around these two horcruxes, making her slowly go evil or mad. Not much else on this though.
Sure Harry destroys the diary and saves Ginny, but what if Nagini stayed away in the forest during that encounter, So Ginny never really finds out that Nagini was a part of Voldemort’s plans as well, so she continues to visit her after all of that happens, still being negatively influenced.