How to Level Up a Soul Emblem
To level up a soul emblem you need to increase your friendship and your proficiency with the character. The quickest way to level up both of these parameters is to provide them with gifts. You can do this from the soul emblem page where you view the various bonuses tied to that soul emblem.
The more you increase a soul emblem’s level, the more bonuses you’re going to receive from the community boards in Kakarot. There are seven community boards to unlock, so make sure you view all of them to see what bonuses you want to receive while playing the game.