Caro's most distinctive feature is her pink hair and the jeweled gloves that house Kerykeion, a specialized "Boost Device" (the design possibly drawing from Magic Knight Rayearth, much like the Wolkenritter's names). She wields both a light pink magic circle and a magical square similar to Lutecia's, though she didn't fully harness the square until episode 17, when she summoned the Dragon King.
Her real strength lies in boost magic and summoning rather than direct attacks. As a dragon summoner, her abilities are legitimately rare and powerful—so much so that the Ru Lushe clan, who raised her in their homeland of Arzus, actually feared her talent enough to exile her. The TSAB was equally hesitant to recruit her, not because of lack of potential, but because her technical skills hadn't caught up to her raw power. Fate T. Harlaown was the one who ultimately took her on.
These days, Caro holds the rank of C-class mage and serves as fullback for the Lightning Squad. Fans often note she seems to have a soft spot for Erio, though nothing official has come of it.
Content compiled by AnimeList.moe from publicly available sources.