Toukoku noted that in the fighting games, Shinmyōmaru wears a pretty thick kimono, that it would get pretty hot in summer, so she'd certainly switch to the unlined kimono she wore in DDC.
But looking at how she looks there... 🤨 it doesn't seem to be the case? Like, when people draw her thick, it's definitely not from the kimono, but the underdress. And I don't think that's part of the kimono?