'Seishin was the one it couldn't possibly be' is presented as a separate reason from being out of his character. That might be relevant to you and how you perceive the 'limit' part: I suspect it's related to the fact that they're kind of fighting at this point.
Edit: My translation of that keeps bugging me so even though it's not the final draft, here's a better version:
As he groaned lightly and rolled over, there was the sound of the door opening in the darkness. 'Seishin?' he had thought for a moment, but he knew too well that it wasn't. Seishin was the only one it couldn't possibly be; even Seishin himself couldn't come in by sneaking into his room as he liked. That meant that the possibilities for who else would visit him in the night like this were limited.
I'm waffling between that an "Seishin though he may be he couldn't come sneaking..." as the grammar implies that in spite of being Seishin he cannot, as if if anyone could be expected to do it, Seishin could. But 'Seishin though he may be' might be too stylized.
Insight into the stupid crap I fuss over that makes your guys' subchapters come out so late. Chapter 4's sub chapters are so long and nuanced that there are a lot more stupid things I get caught up on like this; that's why you're back to once-a-week sub chapters on this.
no subject
Edit: My translation of that keeps bugging me so even though it's not the final draft, here's a better version:
As he groaned lightly and rolled over, there was the sound of the door opening in the darkness. 'Seishin?' he had thought for a moment, but he knew too well that it wasn't. Seishin was the only one it couldn't possibly be; even Seishin himself couldn't come in by sneaking into his room as he liked. That meant that the possibilities for who else would visit him in the night like this were limited.
I'm waffling between that an "Seishin though he may be he couldn't come sneaking..." as the grammar implies that in spite of being Seishin he cannot, as if if anyone could be expected to do it, Seishin could. But 'Seishin though he may be' might be too stylized.
Insight into the stupid crap I fuss over that makes your guys' subchapters come out so late. Chapter 4's sub chapters are so long and nuanced that there are a lot more stupid things I get caught up on like this; that's why you're back to once-a-week sub chapters on this.