/jp/ - Otaku Culture

My headcannon is that this guy is a good's smuggler from the outside world to Gensokyo and vice versa. And Reimu turns a blind eye to his crossing of the barrier because he gives her stuff. He was also connected to Marisas family. When Marisa steals stuff you know she has to know about what she had stolen. They are also close-ish and are both hoarders.

Basically Marisa and Rinnosuke run the Gensokyo black market.