[ UNFORTUNATE COINCIDENCE HIS ASS.. that's basically his immediate thought when he hears this since he doubts anything can be an "unfortunate coincidence" when it comes to such an annoying person.. ]

And you seriously think turning people into that's gonna make her feel any happier? [ That's exactly the point, Shinpachi.. but while he does know Kaoru has something (???) against the Shinsengumi, he doesn't figure out that it's more like he has something against his sister. ]

You're just gonna make your "precious little sister" feel worse!