Yeah... I think I've only ever seen these two together in a doujin twice, both of which Zounose's.
One is that story with Yōmu literally splitting over the idea of Yuyuko having a death wish and potentially ordering Yōmu to kill her. And the other with Marisa and Byakuren stopping an apocalyptic meteorite that landed on Yōkai Mountain.
I swear, if Suwako is his number one, then either of these two are definitely next-in-line on his board.
