Kylo Ren is one of the most popular and most hotly debated characters in the Star Wars saga. Kylo Ren follows in a rich literary tradition of Byronic heroes (and villains), including Wuthering Heights's Heathcliff and InuYasha's Sesshomaru. Byronic heroes are stern, sometimes unlikable romantic heroes.
Source：https://www.cbr.com/anime-characters-just-like-kylo-ren-star-wars/
