Seonghwa is a species of alien from the moon called "moon rabbits." He appears human, but has the distinct features of a bunny, having bunny ears on top of his head and a puffball of a bunny tail on his lower back. Moon rabbits feed on mochi that is made on the moon, so he has an immense love for mochi. He has a blunt personality, enjoying how he can tease others with his witty comments. He usually keeps calm and tends to only care for himself. He's lazy and a little rude at times.