Fukaboshi is an enormous, muscular shark merman, with a wide chest and large arms. He has a long face, framed by wavy fair blue hair flowing down to his shoulders, a sharp and pointy nose, and a dot of some sort printed on the middle of his forehead. He also has a dark blue tail with light blue dots. He has a great sense of responsibility. He has a very serious demeanor, but is also polite. He also seems to be very reasonable and wise. When he does lose his temper, he becomes very aggressive.