Caroline Rillettes (キャロライン・リエット Kyarorain Rietto?), nicknamed Carol (キャロル Kyaroru?) is one of the knight order of Regulus Empire. She is a proud daughter of the Rillettes House and a second-class knight of the Third Order.
Caroline is a devoted knight.
Two things that can set Carol off is reminding her that she is single and of her age; seemingly in a minor delusion that she's younger than she is. While her mother causes the latter, being called "aunt" by Renne causes her to cringe; she accepts "big sister" instead.
- Swordsmanship: Caroline knows how to use a sword.
- The rank of her knighthood is different between the novel and the manga.