"The Precious Sister of The Villainous Grand Duke, also known as Lily, is the titular character of the manga by Reia and Haru-sakura. She is a young girl who is the younger sister of the villainous grand duke of the kingdom.

Lily is a kind and innocent girl who loves animals and has a talent for healing them. She is also very intelligent and capable, often coming up with clever plans to help her brother or friends. She has a strong sense of justice and always tries to do what is right, even if it means going against her brother's wishes.

Despite her virtuous nature, Lily is often misunderstood and mistreated by others because she is the sister of the grand duke. People assume that she shares her brother's evil tendencies and treat her with suspicion and hostility. However, Lily refuses to let their prejudices bring her down and always tries to prove herself by doing good deeds.

Throughout the manga, Lily faces many challenges, including betrayal, danger, and heartache. She is forced to make difficult choices and sacrifices in order to protect those she loves. Despite this, she never loses her compassion or her faith in the goodness of people.

Overall, Lily is a remarkable character who embodies the best qualities of humanity. She is a shining example of kindness, courage, and perseverance, and readers can't help but root for her every step of the way."