Did some changes:
1. Run the whole things trough Word's spell-check to kill any mistakes which I have overlooked.
2. Noted that the Blaze is effective only against materials with low heat resistance.
3. More info about Team MEAR Design, which is a team off people (which included Ewera) which build most of Ewera's gear.
4. Removed the specified details for the makeshift turret of Ewera's Hallowback.
5. Added two years to Ewera's age.

What should be noted:
1. Ewera actually worked in a team; most of the inventions that were made during her stay in Wintra were made with her as a part of the team. The Razor is one of the rare inventions that Ewera made by herself (as a request for a heavy-duty stone cutting tool).
2. Ewera doesn't have a fighting style, just some marksmanship skill. Her equipment might be Core-based but she is good at making stuff which uses Cores, not into understanding how Cores works. Basically she is a down-to ground mechanic with some past climbing experience.
3. About her gear. If you consider the fact that Ewera has no Kage and I don't plan on her getting one then her equipment is the only thing between her and death. Consider the fact that Ewera has and will not have a Kage and the fact that she lacks any kind of actual military training.

LAST!!!
I will not even bother to argue about your comments on the grammar in my CS and Sample. I cloud argue and probably win. But I will not due to the respect I have to you as GMs and the fact that I do not want to bother with that.