Manaka Mukaido

The heroine, and the childhood friend of Hikari Sakishima who has been looked after by him since the two of them were young. Manaka is a middle school girl who is indecisive and prone to crying.

After the time-skip she is found near Shioshishio and brought to the surface. She wakes up one week later, unaged.

After the time-skip, she has lost all her memories which had to do with love. After a while, Uroko says that because of the Sea God, she can’t have feelings for someone anymore.

She told the seaslug that she loves Hikari.