|Relative(s)|| Shima Tokashiki (husband)|
|Manga Debut||Animal 10|
Hiromasa is famous at the hospital as the gentle, good-looking doctor, the nurse usually talk about how he's nothing like a snake and totally a golden retriever, which is part of his blood-line (and that is why he is only partially heavy-seed), and indeed, he always keep a nice smile and never talk bad about anyone, he is caring and nice to everyone. BUT, that is all a farce!
Actually, Hiromasa is a arrogant, self-centerd, mean and sometimes cruel guy just like any other serpent. He is so cruel that when Shima got pregnant and he had the slight impression that the baby was Kunimasa's, he forcefully tried to make Shima abort the baby (by pressing the magoose's belly!)
Hoshino is a madararui, he is able to see people's soul to know whether they are either a madararui or kakuen. His madararui is a jyanome and he can transform into a habu (Japanese snake). He is stronger than an average person and he is very likeable person because of his dog trait.
- In Japanese, Hiromasa mean "wise and straightforward."