The brief sequences shown in The Force Awakens show a group of Knights of Ren surrounding Kylo Ren, whose lightsaber is clearly visible.

In the process, he may have taken the other knights with him and they may have killed many Ewoks in the process. It’s pretty clear that Kylo Ren has his grandfather’s helmet, so he must have gone there to retrieve it, considering that Darth Vader’s corpse was burned on that planet, complete with helmet. The Knights of Ren may have gone to Endor’s moon to retrieve the helmet of Darth Vader. The movie fan site further speculates that the massacre briefly shown in Episode VII might be related to Darth Vader as well. Obviously, Kylo Ren doesn’t need to wear a mask to survive like Darth Vader does, so his appearance might be more of a tribute costume choice for him. They all seem to have the same kind of outfits, resembling Darth Vader’s costume. It’s not known whether any other members of the organization are former Jedis, but in the flashback only Kylo Ren is shown using a Jedi sword. Kylo Ren seems to be the main leader of the Knights of Ren, who also seem to serve Supreme Leader Snoke, a strange character whose background has yet to be explained. It’s unclear at this point what the group’s purpose is and how it evoloved but Screen Rant has a theory about Rey’s vision of them. He’s eager to finish what his grandfather started, and the Knights of Ren might help with that in the future.

Knighs of the force