Thank you for the ask, Mutsu!!! Sorry this took so long to get to, buy I hope you like the responses!
🎭 What does [Yoru] regret most? Would he go back and change it?
Yoru mostly regrets how he acted during his recovery. He was so snappy with his friends, and said a lot of mean things... he also yelled at them a lot, before the abger faded and turned into him ignoring them, even if they were right in front of him. It's why he was so scared to go back to Oumihara-- he was afraid that they hated him for being such a major asshole, even going so far as to completely ignore their messages. He'd left the anger behind before moving to Hokkaido, but he'd been ignoring his friends, and by the time year two rolled around after moving, he felt it was too late to make amends, and became afraid of knowing how they felt about him now.
But his biggest regret isn't a true regret, so to speak. He regrets that he'd been too blinded and self-centered to notice he hadn't been giving his teammates their proper chance to shine on the field. He believes he stole their recognition. But the thing is-- he hadn’t done that, at all. Watanabe and the trauma of Watanabe attacking him has made him believe he was the one at fault, when all of Yoru's old teammates say he'd always made sure they were given their chance to shine-- Watanabe was just jealous that Yoru was their captain and their ace.
Would Yoru go back and undo it? If you'd asked him that in the first year or so after the incident, he wouldn't have hesitated before saying yes. He would have gladly given Watanabe ally he spotlight he wanted if it meant he could still play the way he wanted to. But now? Now, he's alright with what happened. Traumatized, but alright. Because if it hadn't been for the incident, he might never have met Shirou, or the rest of the Hakuren gang. Well-- he might have met Shirou, thanks to Aliea, but he wouldn't have become as close to him, much less gain a beautiful, amazing boyfriend who he would fight the world for.
🎨 Does [Yoru] have any craft skill? Which?
He knows how to sew a little, thanks to Haruka! After he and Haruka had a bad fight while Yoru was recovering, she decided to teach him how to sew as a way to help him focus on something else and keep calm. He's not very good at it, though-- mostly he just mends tears in his clothing. As he gets older, though, he gets interested in things like embroidery.
When he's 25 and Hakuren's assistant coach/trainer, he's good enough at embroidery that he's decorated a bunch of his jeans and vests and stuff with it. Does he wear the ones he's decorated? Not really. Although, he's more likely to wear the vests than he is the pants. (He doesn't really like attention being drawn to his legs, though he enjoys decorating the bad leg side more than the other, anyway.)
He typically embroiders colorful flames or "tie-dye" hearts, usually matching whatever a person's aura looks like. For himself he just lets his body go on auto pilot and pick the colors that way, or he'll base it off a friend.
His friends' most beloved embroidery jobs: a small, simplified embroidery of what Shirou's aura looked like after the merge, hidden beneath the hood on his jacket; a surfboard on Tsunami's swim trunks (he has a similar one on one of his shirt sleeves); a tie dye heart on a soft denim jacket that Natsume and Haruka often share, with their auras mixing together; a pair of pants that have what appears to be a whirlwind of color along the length of the left leg but to those who know, is based off Avalanche, Atsuya, Shirou, and Yoru's first combination hissatsu. It's no longer their go-to-- they create a new one at some point after Shiro and Atsuya merge-- but it's still a hissatsu that means a lot to them.
🛏 What does [Yoru's] bed look like? What does he want it to look like?
Yoru's bed is basically a box spring and a mattress on the floor, no bedframe. It was a loft style bunk bed but then the incident happened and it became too much of a risk with his leg the way it was now. His sheets are a deep, rich blue, and he's got at least three blankets on it at any given time. Two are plain color blankets (kind and color varies depending how he's feeling and what's clean, but at least one is always a denser, heavy blanket that's not fuzzy and good at trapping heat) while the top blanket typically has a deer on it in an autumn forest OR is galaxy themed. All of it is underneath a reversible down comforter that's grey and white plaid on one side and grey and white wavy pattern on the other
If it looked the way he wanted it to look, ideally, he'd go back to the loft bed, or something with easier steps, but he accepts that he can't really do that now because of space and the fact that some days his leg hurt so badly he doesn't want to move, and that's just too dangerous and annoying to bother making his bed that way again.
Since he doesn't want to bother, it'd be a four poster canopy bed. The canopy would be a sheer white with sparkles threaded throughout to make it look like freshly fallen snow, the bedframe black. The sheets would be a light grey made of silk, at least four pillows even if he only uses two on a bad day, still with three blankets, a red comforter, and a "decorative" blanket on top that is super soft and has an anime character he enjoys on it.