(D&D related) So After Reading Jhin's Q&A I realized...
He is a combination of my two favorite classes in Dungeons and Dragons!
He is a blacksmith that is also skilled in magic and combines the two arts into one power method of carrying out his goals. He uses sheer magic to create bullets that can do different things. Most of how Jhin is presented in-game and his methods of fighting revolve around his mechanical and blacksmith skills in conjunction with his custom, magical bullets. He is also a marksman that specializes in his own custom ranged weapon.
His primary class is the DDO-flavored Artificer!
https://thefrugalgamer.files.wordpress.com/2012/06/dndclient-2012-06-23-22-48-15-13.jpg
He is also an "artist" with a respectable knowledge of the world's lore and many arts (including theater and music). He has a high charisma to go with his intelligence. Although we do not see much of this aspect to him in gameplay, it is definitely his calling to be a performer and he takes every chance he can to emphasize this.
He is- quite obviously- a** Bard** as well.
Obligatory: Yes... he is Chaotic Neutral which is a classic bard (crazy jester) or artificer (mad scientist) alignment
Edit Neutral-Chaotic Evil. One of the two. Still fits the class.