A friend made an anonymous account and backstabbed us?

[Faith]

There's this mysterious account that added me and my friends on Facebook. At first I thought it was (let's, just call him) "Parrot". But then I had a knacking suspicion that it was "Azula", who's a very close friend of mine. I've talked to the mysterious account that's named "Luciana". And I tried to figure out who it was. I really thought it was Azula, because whenever I was talking to both Azula and Luciana, Azula would always 'guess' what we were talking about. There was even one time when I was talking to Azula and she told me that Luciana hasn't been messaging us for a while, and then 5 minutes latr, Luciana Messaged me. I didn't wanna believe that Luciana is really Azula and I just assumed it was Parrot because he has a history of making fake accounts before just to talk to me and my friends (he would always deactivate it immediately since we always figure out firsthand that it's him). For the past few weeks, the messages that Luciana have been sending my friends and I are going nastier. And so my friends and I are really troubled now. My bestfriend, Kitty tried talking Luciana into revealing its identity and Luciana said that it's true identity is parrot. But, another close friend of mine, Koala, has always told us that she suspects Azula greatly because if a plan they've made together before. Koala told us that Azula and her once planned to create a fake account for a prank to the guys (parrot and his friends). Though, koala thought that it might not be a good idea so she deactivated the fake account they've made. Now koala thinks that Azula re activated the account and changed its name to Luciana. To confirm my suspicions further, I asked parrot directly if he really is Luciana since Luciana itself claimed its parrot. Parrot denied and at first was confused on who I was talking about. Then now, I know that parrot is not Luciana. Because if parrot was really Luciana then he wouldn't have denied since Luciana itself claimed to be parrot. When I think about it, all the evidence is pointing to Azula. And now, I believe that it might be her even though I don't want to. Luciana has been very mean to not just me but as well as my other friends. Luciana was telling me rumors about myself, threatening me, and tries to bully me online. Now if Azula is really Luciana, I don't know why she does this to me. I've never done anything bad to her. I am even the one who've helped her through almost everything since she was new in the school. My friends and I have trusted her so much. She even knows mine and Kitty's crushes. I'm not getting any of her actions. I thought that we were really good friends since I even share with her my obsession with Avatar and Death Note. What should I do now? How am I supposed to make Azula confess that she's Luciana? And how can I deal with it?

[L]

Seriously, I would just block or ignore the person. As to why your friend would do that, jealousy makes people very nasty. You don't need all the drama! Cut off all ties with this person and the person you suspect. They are not your real friends. With friends like that, who needs enemies. Bullying is never acceptable and the best way to stop it is to block or ignore it completely because then the bully loses their power and will move on.