Ricotta Elmar, commonly called Rico, is the remarkably young Chief Researcher and Chief Engineer of the National Research School of Biscotti, a position she holds at just thirteen years of age. She possesses a short stature and youthful appearance, with long orange hair, orange eyes, and a pair of distinctive pointy orange animal ears. A fluffy tail, which often moves when she is excited, completes her look. Her standard outfit is a white collared button-down shirt, a beige vest, and a red skirt, accessorized with a red ribbon beneath her collar, a long white cape, and brown shoes. She is sometimes seen in a short-sleeved variation of her white shirt.

She is highly intelligent, friendly, and bubbly by nature, driven by an insatiable curiosity that compels her to meticulously analyze unfamiliar machinery and technology. A notable speech habit is her tendency to end sentences with "~de arimasu." She has a pronounced fondness for sweet foods, which she claims provide essential energy for thinking, and she enjoys physical affection like being stroked. She displays significant emotional depth, experiencing intense distress when confronted with obstacles, especially those hindering her project to send a summoned hero home.

A child prodigy in engineering and technology, she invented a fully functional telecommunications system for Flonyard at the age of five, a system still in widespread use. She eventually ascended to lead the Biscotti National Research Academy, where her primary and deeply dedicated research focuses on finding methods to transport summoned heroes back to their original worlds.

She maintains extensive and positive relationships, sharing a close friendship with Princess Millhiore F. Biscotti and a strong collaborative bond with Yukikaze Panettone, with whom she performs a combined special attack. Her interactions with the hero Shinku Izumi are particularly meaningful; she grows deeply attached to him through her work, suggesting a potential romantic interest underscored by extreme emotional reactions to the potential failure of her mission. She also fosters a deep friendship with Noir Vinocacao of Galette.

In combat, she operates as a gunner, utilizing small, self-summoned artillery guns and magical Emblem Arts that draw power, known as Flonyard Power, from the environment. Her expertise lies in tactical long-range warfare, strategically using magic and technology to compensate for any lack of physical strength.

A key moment in her development occurred when she received gifts from Shinku, including a four-color ballpoint pen and portable speakers. While her initial impulse was to analyze them, her emotional connection to these specific items led her to vow never to take them apart, marking a shift from pure analytical curiosity to sentimental attachment.