There were a lot of things alive inside of it. Among them were giant parasitic worms, and leg sharks.
That being said, if you want to get on Yggdrasil, the multiversal void is breathable(you won't suffocate in it at least) and you could appear outside of it, and if that was the case people would probably move to help Guts get inside.This plan, for example. I'm not sure how you'd even know Guts was in the whale corpse if it was just floating in space. But if you really, really insist, I can choose some other place to land.
Accelerator's been shot down already. He was one of my first character attempts lol.The point still stands. There's no need to warp a character just because they don't have a ridiculously strong, easy-to-use attack. Uiharu has great computer skills, which are good for support, provided you're willing to be clever about it. Also altering a character who's weak at direct combat to suddenly be the best at it without any effort seems kinda disrespectful to said character's original concept.
Thermal conduction is already a problem here. If something hits absolute zero, I imagine it would lower the surrounding area to lethal levels immediately. On top of that, matter takes on weird properties at CLOSE to absolute zero, but we've never actually seen something get there. Also, Uiharu was intentionally designed with a low-level ability, one that I must add is compensated for with her genius ability in computers. You should appreciate that; it's no fun to use an 'I-win' button, especially if the character never had one in the first place. If it's really necessary to play an obscenely powerful character, Index alone has characters like Accelerator.Uiharu's esper ability is temperature manipulation. At a Level 1, it allows her to maintain a fixed temperature of anything she touches. Ramp it up to it's high end effect, and you're effectively looking at flipping off nature and thermodynamics to do whatever the hell you want in regards to heat. So I could see her being able to lower something to absolute zero without freezing the universe, though admittedly not without quite a bit of effort.Absolute zero is the temperature Hydrogen freezes solid at. While it's theoretically possible to reach, it's logically impossible to reach without bringing the entire rest of the universe to absolute zero, considering the nature of thermodynamics.And suddenly everyone gets shot to ABSOLUTE ZERO. dedWhile she could theoretically do that, absolute zero is a bit extreme if you're simply trying to kill someone, y'know?