Cecile is a secondary character in the anime In Another World With My Smartphone, known for her role as a maid in the service of the protagonist, Touya Mochizuki. She is a young woman with brown hair, often noted for her cheerful and lighthearted personality, which contrasts with the more serious demeanor of her fellow maid, Lapis. Cecile is also distinguished by her voluptuous figure.

On the surface, Cecile is simply a maid assigned to Touya's household from the Maid Guild. However, her true identity is that of a covert operative. Both she and Lapis are members of Espion, the intelligence unit directly under the authority of the King of Belfast. Their primary mission as maids is to secretly protect Princess Yumina Ernea Belfast, who is part of Touya's growing circle of companions.

Cecile's role in the story evolves from that of a spy to a trusted retainer. Initially, her true purpose is unknown to Touya, who eventually discovers her and Lapis's secret and apprehends them, mistaking them for genuine threats. Upon learning their true loyalties and mission, he accepts their presence in his household. Following the establishment of the Brunhild Dukedom, Cecile leaves Espion and officially becomes a member of the new dukedom, continuing her duties as a maid in Touya's service.

Cecile possesses notable abilities that extend beyond standard housekeeping. Her specialty is throwing knives, a skill she has honed to a high degree. Her proficiency is demonstrated during a critical battle against a black dragon, where she discreetly throws a dagger to blind the creature in one eye, providing crucial assistance to Touya in the fight. This action highlights her value not just as a domestic worker but as a capable combatant in high-stakes situations.