Hello to you again~
In relation to your last message:
Rikuo & Tsurara:
If you ever read up about the recent character polls, Rikuo and Tsurara are respectably first and second. So, it would be a challenge in yet would fulfill most fans' desire to see them together whether it's a love scene or not.
Rikuo & Yura:
These two are a delicate pair. Still, they complement one another due to the different backgrounds. The recent manga chapters with those two highlighted their growing bond. It is a good idea to choose her for a female partner instead of Tsurara to cosplay.
Rikuo & Kuro:
In terms of cosplay, those two would be easier to dress and to pose. In terms of relationship value, most would think Rikuo to fight or pair up with Kubinashi. This is a nice change of pace though because not many would think about this pair.
Rikuo & Semei:
Ahaha... naked.
That would leave much impact if he was naked.
When I think of Seimei, I think of Gitsune. Still, it would be a quite a spectacle to pose Seimei with Rikuo. If you can unleash the profound aura that those two have, it shall work very well.
Rikuo & Itaku:
Itaku has been rising in terms of popularity and those two appear to go hand in hand. So, having a fight scene between them would do nicely while coming out with a brotherly bond.
Although, Zen and Ryuuji can work as well. These guys are noticeable in features and personality.