Edomae, Lunar

江戸前留奈

Lunar is Sun's childhood friend and rival. She has leveraged the powers of her mermaid voice to become a pop idol singer. She appears to suffer from a superiority complex and never misses a chance to overshadow Sun. Initially believing that Sun was boasting about Nagasumi to her, she decides to steal him away in an attempt to outdo Sun by making Nagasumi her servant, since Nagasumi has also seen her mermaid form. Later, she decides to live in Nagasumi's house until his period of servitude ends.