Secrets of the Silent Witch, Vol. 1 (novel)

Monica Movalette, the Silent Witch, is the world’s only practitioner of Voiceless Magic, a veritable heroine who single-handedly fended off the Black Dragon of legend. However, the young prodigy is actually...super-duper shy! Yup, turns out she only learned Voiceless Magic to avoid speaking in public. Ignorant of this, Seven Sages have placed her on a top-secret mission to guard the Second Prince. Can Monica keep it together as she contends with both social interaction and the evils targeting the young royal?