Peri has a peculiar personality, and, in the Japanese version, she often refers to herself in a third-person point of view (a trait associated with children, very immature people or someone who wants to look cutesy) ever since her mother died. She acts mostly like a spoiled child and has childish enthusiasm, especially in terms of causing bloodshed. She has sudden, if not sometimes random, impulses for killing people as a result of witnessing her mother's sudden murder when she was young, and often comes off as scary to other people due to her immense bloodlust toward basically anything that angers her, including her allies. This is shown in her supports with Felicia, where Peri attempts to kill her because of her clumsiness. While she enjoys killing, she enjoys a challenge and respects those that fight well, where she asks Felicia to come over to her mansion to train her servants, stating that "there's no fun if they fall apart after one hit."