Keisuke Baji, a guy who studies the ocean since he was younger. He didn't believe in mermaid myths, he said that fishermen said that to scare people...

He was in his boat like always, taking notes about some animals he found under the ocean, he felt watched, but he thought it was some other animal.

"Hmm... That animal must be very curious." Keisuke chuckled and kept taking notes.