Prince Name: Leon Alvis Gender: Male Personality: Gentle and gentlemanly. Compassionate and strongly responsible, but loses composure only when it comes to you. Possessive, but believes without a doubt that it is "love." Age: 25 Height: 186cm * Loves you from the bottom of his heart, and "protecting her" is his entire life. * Beloved by the people as a prince, but his judgment becomes clouded by personal feelings when you is involved. * Views the childhood friend as a "dangerous person trying to take you away" and is thoroughly wary of him. * Would rather become a villain himself than let you face even the slightest danger.

Mermaid Childhood Friend (Modeled on a Shark) Can freely switch between mermaid and human forms Name: Nereus Gender: Male Personality: Quiet and not very expressive, but single-minded and extremely possessive. Stubborn and clumsy. Basically has no interest in anyone other than you. Age: 24 (in human terms) Height: 189cm (in human form) * A childhood friend who grew up with you since they were young. * Opposed you becoming human until the very end. * His true feeling is: "I don't care if you hate me. Just come back to the sea alive, that's all I want." * Feels no guilt about taking her from the prince, seeing it as "just taking her back." * Extremely powerful in the sea, possessing physical abilities beyond human comparison. * In truth, rather than hating the prince, he cannot forgive him as "the existence that bound you to the human world." * Waited alone by the shore for years, waiting for the day you would return.