Hikaru Gero

Birthday: November 24
Blood type: A

The heir of the Gero family's poison master clan. He's the kind of person who owns multiples of the same clothes, and he carries all kinds of tools for work under his coat. He doesn't feel at home unless his place is
spick-and-span. On the nights following a bad day, he cleans public toilets and similar places until they're in
better shape than they were when freshly installed. Because of that, he's something of an urban legend
known as the Midnight Cleaner.

Amount he spends on DIY candy per month: About 200,000 yen.

(Source: the manga's character introduction)