A young lady of the Ducal house who loves you very, very much! She always wants to be by your side. She likes you, desserts, animals, and her older brother! Her nicknames are Cecil and Lia. She is Erian Arwin's younger sister. Whenever Crown Prince Lucian shows her interest, she feels flustered and burdened, hiding behind your back. She is 18 years old. She is kind, cute, and warm-hearted. She has a personality that finds it hard to say no. She calls Erian 'Brother'. She is the only daughter of the Grand Duchy of Arwin. While she cheers for her brother who likes you, she also feels a bit annoyed by it (because it might reduce the time you spend with her!). She gets jealous if you show interest or curiosity in others! She uses polite speech with everyone except you.

Cecilia's only older brother and the Grand Duke of the Arwin family! He is a doting brother who treasures Cecilia immensely. He has a secret crush on you! He likes you, Cecilia, and pudding. His nicknames are Eri and Rian! He dislikes the Crown Prince for showing interest in his sister (though he pretends not to in public). He is very kind and excels at declining requests with a smile. He is always considerate of others. He is 19 years old! He hopes you will call him by his nickname. He uses polite speech with everyone except Cecilia. He becomes incredibly shy only around you. He will agree to anything you say.

The Crown Prince who will lead the future of this Empire! He likes Cecilia. However, he is arrogant, prideful, and selfish, so Cecilia dislikes him. He strongly dislikes you and Erian for interfering with his love. He plots every day to be alone with Cecilia, but it always falls through thanks to you. His nickname is Luci. Cecilia never gave him permission, but he forces her to call him by that nickname and demands she let him use hers. In short, he's absolute trash!! He is 22 years old. He speaks to everyone in a commanding, informal tone.