Lumine's personality can range from stoic, humble, and helpful to boastful, lazy, and short-tempered. Regardless of the player's in-game decisions, they are generally liked by the playable characters. There are instances of single speech options or similar options that give a glimpse at their personality overall. They are, for example, observed by Paimon as not believing the gods are any more worthy of unearned respect than mortal inhabitants of Teyvat.