Liselotte Cretia is the only daughter of the Duke Cretia family, a prominent noble household in the Galarc Kingdom. As the youngest child of this distinguished house, she is widely regarded as one of the most sought-after noble daughters in the country. From a very young age, Liselotte displayed exceptional intellect and drive, graduating from the royal academy after skipping several grades. By the age of fifteen, she had already founded the Rikka Trading Company, a major commercial organization that grew into an international enterprise with branches in neighboring countries. She was also appointed as the governor of the city of Amand, which she developed from territory given to her by her parents into one of the most prosperous cities in the kingdom.

Liselotte possesses the memories of her previous life as Minamoto Rikka, a Japanese high school student who died in a bus accident. This past life has given her a modern perspective and a pragmatic, forward-thinking mindset. Her personality is bright and composed, with a development-oriented nature that drives her to set clear goals and work diligently to achieve them. She is known for her ability to remain calm and collect herself no matter the situation, viewing events from a broad perspective and maintaining her composure even during crises. As the head of Amand, she deals with all visitors with proper decorum and is skilled at raising the morale of those around her, demonstrating strong leadership and administrative ability.

Liselotte is deeply motivated by a sense of responsibility toward her city and her people. She is committed to protecting Amand and ensuring its prosperity, and she approaches threats with a firm and resolute stance. Her role in the story is primarily as a supporting character, though she is considered one of the main heroines. She appears during key arcs related to the political and commercial affairs of the Galarc Kingdom, and her position as a powerful noble and business leader makes her an influential figure in the wider world. She interacts with Rio, the protagonist, on several occasions, and her appreciation for his knowledge of tea reveals a more youthful and warm side to her personality.

Key relationships include her connection to Rio, whom she respects and engages with as a capable and knowledgeable individual. She also works alongside other figures in the Galarc Kingdom, including her family and the royal court. Over the course of the story, Liselotte shows development from a diligent young governor into a more experienced and decisive leader, capable of standing firm against external threats while still maintaining the grace and propriety expected of her station. In terms of notable abilities, Liselotte is an accomplished businesswoman and administrator, having built a thriving international company and governed a major city successfully. She is also knowledgeable about commerce, diplomacy, and governance, and she uses her sharp intellect and calm demeanor to navigate complex political and economic situations. While she is not depicted as a combatant, her strategic mind and leadership skills make her a formidable figure in her own right.