He is depicted as an enigmatic and charismatic individual with a laid-back attitude. He is curious and adventurous, often seeking out new experiences and knowledge. Rantaro also has a calm and collected demeanor, making him a reliable and level-headed presence in difficult situations. Despite his easy-going personality, Rantaro has a mysterious past and harbors some secrets that he keeps to himself. Overall, Rantaro is a charming and intriguing boy with a strong sense of curiosity.