The developers, Ubisoft Massive, have found a way to restore all missing characters. As you may know, some The Division characters have gone missing after the last update, Incursions. The bug is exclusive to the Xbox One version of the game. As it turns out, the characters weren't missing. Instead, after the patch, the game treated the save files as corrupted. This resulted in the disappearance of the characters. So, their data is still there, in the save files. And developers are working on the hotfix that will restore it. As it is said in the official forum post, the character data will be restored and all characters will be rolled back to a state that they were into before the update, Incursions.