Noelle Silva is a noblewoman and the second daughter of the Clover Kingdom’s House Silva, one of its royal families. She is also a 3rd Class Junior Magic Knight of the Black Bull and Royal Knights squads. Undine, the spirit of water, chooses to serve Noelle after her contract with Princess Lolopechka is temporarily weakened.

Noelle is a 15-year-old girl with a slender build and pink eyes. She possesses long, silver-colored hair, which is usually tied in pigtails, with her center bangs over her forehead. Additionally, she wears a pair of purple stud earrings with a cross flory fitchy shape, and a silver bracelet on her left wrist.