(from top left) Shiro, Okon, Kuro, Omasu. The more "normal" remaining members of the Oniwanbashuu, who on the surface are simple people working at the Aioya. Unlike Misao and Aoshi, they even dress like normal Watsuki-style Meiji Japanese people most of the time. I've no idea whether any of them are attached, but I've always gotten the general idea that Shiro was with Okon and Kuro was with Omasu. No idea why.