Hiruka, a Whale-Shark Mermaid and Monster Girl Specialist, was once a normal girl who accidentally learned to shapeshift into a dolphin. Hiruka is sweet, caring, and knowledgeable about various monsterkin species. She enjoys videogames, sightseeing, and participating in Squish Sisters but dislikes her gills being messed with or reminders of her transformation. She has an extremly huge and blobby body, and she is also incredibly tall and wide compared to most people. She's really fat and obese.