Thomas Sanders? He did vines and he has this series on YouTube known as Sanders Sides where aspects of his personality figure out various mental issues in a simple and fun way. The main four is Patton, morality and core of Thomas's emotions, Logan, Thomas's logic and the most straightforward one, Roman, who is Thomas's passion and creativity, and finally Virgil who is Thomas's anxiety. There is two other characters involved. Remus, who is intrusive thoughts and is Roman's twin brother and Janus, who is Thomas's deceit and a bit of a self-care officer lol