[quote=Stitches]
EDIT: Reading through Kalas' post makes it seem Hioshimi is a copy of Jinzo...I assure you, the trauma in Hio is less pronounced compared to Jinzo, and (certainly combat-wise) the pair of them are completely different. Theory, though; if Jinzo and Hio have trouble sleeping, surely they've met each other often at silly times in the morning? Character development, it happens.
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I'll admit, I haven't gotten around to reading Hioshimi's CS yet but I did read through your post before writing up mine and I had to alter some of my original plans for the post. Namely the sudden wake up from his nightmare, the current way fits a lot better, however. And it wouldn't be unheard of for more than one person to have trouble sleeping in the Seireitei, so your theory is pretty good. Certainly one I'd be more than happy to indulge in. :)