Sephiroth slipped away quickly. He was in no mood to make more trouble for himself, and used to being treated dismissively. People who really knew what he was capable of were few and far between, and it didn't always change their attitude for the better. He didn't look like a warrior. Too small. Build and features too delicate. Hair that refused to stay shorter than shoulder-length for any reasonable span of time, which had always been a ready excuse for any of his instructors back at the academy that took a dislike to him to harangue him about "breach of dress regulations". At least he didn't have to worry about that anymore.
Not everyone was openly hostile. Once people got used to him, if they got used to him, they tended to let him fade into the background. No one wanted to have to deal with him, and he was quiet and had learned how not to draw attention to himself. Some of the older SOLDIER members watched out for him in a casual sort of way, protesting the harsher aspects of his training and feeling the need to try and shelter him from realities he was already all too aware of. He tried not to read too much into it. It was only an instinctive caring response towards a younger member of one's group.
He went straight to his room. Back in Junon with his mind buzzing like this he might have sneaked out to look at the stars, the few that were visible over the city. It always calmed him down, somehow. But he was under closer monitoring here, security was on alert, and anyway it would be pointless. You couldn't see any stars over Midgar.
Back in his room he didn't bother to turn the lights on. He preferred the dark, even though it made the mako glow in his eyes more obvious. At least all SOLDIERs had that to a greater or lesser degree, though people still managed to miss it if they weren't used to specifically looking - they just saw what they wanted to see and glossed over any oddity. Bright light hid the glow somewhat, but in his case just made the unnatural shape of his pupils immediately apparent. And it reminded him too much of the labs.
He got changed out of his uniform and headed for the bathroom, hoping that his usual routine would persuade his body and mind it was time to sleep.