Re: Katori Mirai
I vote for the second. It has greater comedic value which can balance the darker portions of the plot when it gets going.
He'll try to secure Yori's services if pressurised by others. Basically he'll try to get him to join once the issue's raised, since otherwise he's rather apathetic about all matters. Plus he will be on him like a stalker once he finds a personal use for the guy. Mirai's lazy - he's not a moron.