The characters you should focus on to make the most of your experience-gathering efforts are: • Five-star characters: If you’ve managed to receive one of these units at the early stages of the game, do your best to level them up. They come with powerful special abilities and stats that make them sought after. Such units include Mona, Klee, Diluc, and Venti. • Custom character: The character you start your game with is also a great option. While players don’t require them in their parties, they do appear for certain cutscenes and story segments, which amount to a long time spent in the storyline. While having this character as part of your party is optional, leveling them up is an excellent way of getting the hang of the game. • Noelle: This is a defensive character that possesses the "Earth" ability. She’s a terrific choice because her ability lets her transfer a shield to the character you select. While she moves slowly, her overall capabilities are quite powerful.