Juleka is very shy. She doesn't speak as often as the rest of her classmates, and when she does it is often in a self-conscious mumble. She is rarely particularly expressive, though she will be in some cases, including calling out being through with Kim's "stupid dares" in "Timebreaker".[4] She seems to like scary things, or be unafraid of such, as she is the only student to not fear Horrificator, instead of calling her "awesome" in the episode of the same name. Because of her quiet nature, Juleka feels like no one ever notices her and forgets she is around, but she is aware that there are people that care about her, to whom she expresses compassion and gentleness too.

As Reflekta, she is proud and vengeful. Because no one ever paid attention to her, she wants everyone to look like her to be never unnoticed again. In particular, she wants to transform Chloé because she prevented her from being the in the class photo. Without a second thought, she even transforms people who are nice to her and notice her, including Rose. She is quite vain, constantly telling everyone that they will look better once they look like her and reassures them that they look amazing once they are transformed. Due to this arrogance, she believes her victims like their new looks, when they clearly do not. She is cunning as well, figuring out Ladybug's plan to catch her and persuading a transformed André Bourgeois that she'll turn him back to normal if he tricks Ladybug and Cat Noir into believing he is her.

(voice reference: Meek, soft, Medium-Low. (Reflekta) Medium-High, Lively, Stereotypical evil tone)