There actually needs to be a decent bit more done with this character. I'll take it from the top, in order.
In build, define muscular. Is he wiry and lean, or is he a bodybuilder? Is there a lot of definition, or is it just sheer bulk muscle? Muscular is a VERY loose term, and doesn't present a good image on its own.
Under eyes, remove the part describing how they appear to others. That's up to other players, not you. You can write about him glowering, but you can't decide how other people will perceive it.
Go ahead and remove the ears section. That's really only needed if you want to clarify something outside of the norm, since we have races with non-human ears.
For the hair, how long is it? Is it curly? What kind of white is it? Give us a little more detail. As it is written right now, it could look like curly little old lady hair.
The personality needs a LOT more detail right now. A single line tells me effectively nothing about his personality. What's his drive? Is he hedonistic? Does he tend to take charge, or does he follow the lead of others? You say he's very loyal to his friends, but does he make friends easily? Does he trust people? Read through
this link, it's a good way to fill out a personality.
The goals are... kinda faulty. If he's a full blood IDSOL, he would have been made by the DIoN, there's not much question. They tend to crack down on people making their own IDSOLs, for what should be obvious reasons. We'll talk more about this idea on the history section, but overall, he needs more detailed, long term goals, that he couldn't answer by literally opening SARP's internet.
Now. The history. It's... not very believable. Like I said above, pure-blood IDSOLs are a military technology, and not one the Neps are likely to just hand out. Hybrids are a different story, but they don't maintain the gigantic size that full-bloods do on average. This leads to the next part, which is the escape. We're talking about a military that is made up of LOTS of big, strong men, a solid chunk of them being IDSOLs or hybrid IDSOLS. They have procedures and equipment in place that is DESIGNED to cope with those kinds of people on a regular basis, let alone one time. If he tried to break out, armed guards (some of whom would likely be full or part IDSOL themselves) would be more than happy to incapacitate him, and he would be in a facility designed to make sure they COULD suppress anyone who got out of hand.
Now, rather than keep pointing out why it doesn't work, let me just say that if you make him a Hybrid, it becomes... more believable. Still not great, since anywhere that was creating IDSOLs, even hybrids, would be designed to deal with them, but more believable, because it wouldn't be under the auspices of the military.
The last part just flat out doesn't work. An individual simply doesn't screw with the Blacks. They ARE the underground market, and they effectively own the slums. If he screwed with them, he wouldn't last a day, because they could very, very easily kill him. Go with a random gang here, that just happened to be big near him, don't get involved with the Black Syndicate.
Now, for skills.
Nepleslian is actually called Trade, and Yamataian is Yamataigo. Also, keep in mind that Yamataigo, like Japanese, uses a different script. It's highly unlikely he could learn that without a teacher of some sort, especially from books.
Under engineering, where is he getting the specifications for the "advanced technologies"? Much like pure ID-SOLs, most of the higher end military tech is restricted, and only licensed to trusted manufacturers, if even that.
In fighting, remove the generalizations. Literally nobody is skilled with every weapon out there. Ask any weapons specialist, in real life, even. If you really want to get good, you focus on something. I could believe he at least knows the basic usage of a wide range of stuff, but even then, it wouldn't come close to "all". Just for melee weapons, like you have listed, you can split it down into knives, and inside of just knives, there are dozens, if not hundreds, of different kinds of knives, each of which has its own quirks in terms of how it is used. Getting skilled with a dozen knives alone would be a matter of years of practice, and that's assuming he doesn't do much but train.
Under rogue, again, just tone it back. Don't say he can move with "amazing silence", say he's learned how to move quietly. He doesn't instinctively know how to navigate the streets anywhere, but he can know how to recognize the kinds of neighborhoods he's in.
Survival, hyperbole again. He can't smell food from a mile off, but he knows how to find food in a city. Straight out remove the "hunting animals is the same as hunting humans" part. I like the part about not being able to identify plants at all, though, that's a nice little quirk.
Under physical, remove the comparisons. He can be experienced in parkour, and be a good runner, but it's up to the GM if he's faster than everyone else. Don't write this kinda stuff as comparisons, describe it. He's experienced at sprinting, so he has good stamina, and can sustain those speeds a bit longer, he's done a lot of climbing, so he's quick at finding and using handholds. And so on.
Where did he learn programming? That's not the kind of thing you'd really learn just on the side, being able to interpret coding is a pretty hard to learn skill.
Under maintenance, again, tone it back. He can't repair ANY system just by seeing it. But sure, he can probably fix something using familiar technology with a bit of study.
The big part here is that you're actually only allowed 7 skills to start with, unless you request a specific exception, and can give a pretty convincing reason why. You can learn more later, but 7 is the standard to start with.
The character isn't bad, but there is a lot of little stuff that needs to be worked, especially on the spelling/grammar side of things. If nothing else, drop the bio in Word, and let that check it for you.