Where to Find More Details on Kylo Ren's Story
Much of the story of Kylo Ren and his connection to the dark side is being saved so far, presumably for Episodes VIII and XI. The dossier on Han Solo and Leia Organa’s son, Ben Solo, is slim and primarily filled from scenes from Star Wars: The Force Awakens or found in supplementary material like The Force Awakens: The Visual Dictionary and The Art of Star Wars: The Force Awakens. But still, if you dig deep enough there are more Kylo tidbits to be found out there in the media beyond the movies.
Kylo is the master of a group called the Knights of Ren. He associates with and takes orders from Supreme Leader Snoke. He spent some time training with Luke Skywalker, but it didn’t end well. He idolizes and wants to emulate his grandfather, Darth Vader. He has access to excellent hair care products (maybe the First Order has a salon?). He made his cross-guard lightsaber using an ancient design, and he uses it to wreck consoles when he’s angry. Those are the basics.