[quote=@Chevaleresse]
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Approved, she sounds fantastic.

I [i]especially[/i] love the designer earmuffs...!

[quote=@Foster]
<many words, I will not bother repeating from one post above>
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She just sounds like she has too many 'cool' things going on to me. She's a hybrid [i]and[/i] she has dermal plating she installed herself(!!), [i]and[/i] she has an MAS shotgun she uses, [i]and[/i] she sometimes uses an MAS rifle by hand, [i]and[/i] she has a camo cloak, [i]and[/i] she's really fast, [i]and[/i] she's really durable, [i]and[/i] she can do coms-wizz and hacker stuff, [i]and[/i] she was a successful tank commander, [i]and-[/i]
It's bit [i]too[/i] much, and too extra for what I'm pitching. 

Her being a hybrid is being 'special' enough TBH, as she's the only one of her kind. That and one of the other things would probably make her stand out. But even so; she's a bit too... [i]extra[/i] in some ways for my liking - I have to admit, the 'installed dermal plating herself' thing made me audibly groan and roll my eyes, especially combined with the 'shunned loner, who works alone most often'. It's a bit of a cliche storm right now, especially adding in the 'and she carries really big guns she made herself'. 
It needs a bit of toning down and moderation. Bear in mind, your characters are:
a) already part of an elite operations unit
b) already piloting mecha
They don't [i]need[/i] to do much to be super cool, both of those things are few and far between in the setting, and your characters have been hand-picked for their roles. 
Which, also, means that while 'quirky' individual personality traits and distinctions in actions are definitely wanted, things like 'got high and performed surgery on herself, and lacks impulse control' probably isn't going to put someone first in line for consideration. 

Also, I'm just flat-out saying 'no' to the MAS weapons being used at character scale. Regardless of any real-world justification. 
If you want her to have a big gun, have her personal weapons be something like an LMG, an auto shotgun or an antimateriel rifle. 

Please rework her, or come up with a new character concept, as at the moment I'm not going to approve Felix as she is