So, I was trying to complete the Civil War questline, and fast traveled to dawnstar. I heard a Dragon, and since I had 100 sneak, I crouched to see if I would go invisible (It means enemies are searching and/or trying to find me.)
I did go invisible, but it was a snow troll. It get's weirder.
I had my sword out, about to kill the troll, WHEN the Dragon, no joke, landed next to me and helped me kill the troll. It even looked at me, and then flew away, I wasn't even crouching! It went to attack dawnstar (only killed the guards and left lol)
It didn't even kill any civilians, which in return, they didn't try to kill the dragon either. The civilians were acting like as if the player (Dragonborn) was attacking the guards, running away, saying "this should be good" and "a fight!"
No signs pointed at it being an enemy to me (The music, civilians trying to fight it, it attacking me).
I guess the game registered it as friendly, because I could also skip time or "wait" near it.
I've been playing skyrim for a long time, and this is the first time something like this happened to me.
On another note, this is my first Discussion Post, and I apologize if I messed anything up. ALSO I will edit or comment to the post, to say what I forgot and/or with updates, probably.