Arle is a cheery girl that's somewhat of a tomboy. In Puyo Puyo Tetris, it's been stated she hates proper etiquette such as hand sanitation and being told not to play with your food.  Although she's normally optimistic, she has her limits and will start scolding others if irritated. She typically acts as the "straight man" of the cast, often being bewildered by the many weirdos and jerks she encounters. A common example is with Satan, who often comes up with out there schemes to marry her, which often causes Arle to respond with annoyance, anger, or disappointment. Because of this, she can sometimes come off as surprisingly mean-spirited, either intentionally ignoring her opponents or flat out mocking them. Regardless, she doesn't hold personal grudges towards anyone, even for her many enemies and rivals.