Sakamoto

Serving as the devoted butler to Karen, Sakamoto cares for her while her parents pursue their musical careers abroad. He treats her with utmost respect, often using affectionate terms, displaying a paternal fondness for her. Sakamoto frequently looks out for Karen's well-being, especially ensuring she doesn't feel lonely, and he plays an active role in her life by driving her to school and offering meals, demonstrating his skills in navigation and cooking.