I made a mistake with the tags, having never created one before; this beautiful person is Xianming Lin (character) from Hakata Tonkotsu Ramens (copyright). I do not know how to designate these tags separately from general tags, so I would appreciate if someone could fix them.

@吹雪
When adding in the tags, you type character:character_name to make a new character tag. (In other words, just add "Char:" in front.) The same goes for artists and copyrights. See the howto:tag page for more detail.