Caren is the stepsister of the protagonist, Allen, and holds the position of Vice President of the student council at the Royal Academy. A noticeable aspect of her personality is a strong devotion to her brother, which manifests as a protective and possessive attitude towards him. Her fierce loyalty is a defining trait, though it can also make her seem combative, particularly regarding matters of Allen's affections.

Her motivations are heavily tied to her relationship with Allen. She is notably resistant to acknowledging Lydia Leinster as her sister-in-law, leading to frequent heated arguments with Lydia over Allen. Conversely, she can also put aside her rivalry and act as a reliable ally when the situation calls for it. In her role as student council vice president, she often finds herself acting as a mediator between the academy's elite establishment and Allen's unorthodox methods, forcing her to choose between her loyalty to the institution and her bond with her brother.

Regarding key relationships, Caren maintains close friendships with Stella Howard and Felicia Fosse, who provide her with support and camaraderie. She views younger students like Tina Howard as endearing underclassmen but remains vigilant against any of them winning Allen's favor. She was the very first person with whom Allen formed a magical connection, establishing a profound and unique link between them.

In terms of magical abilities, Caren has a natural affinity for lightning magic. She is also highly skilled in combat, capable of wielding the legendary Orglen magic battle axe spear named Deep Purple with an ease that would be daunting for even the most experienced fighters. Her development as a character is shaped by her struggle to balance her personal feelings with her duties, as she must decide whether to follow the institution that accepted her or the brother who taught her to trust her instincts.