First off, I okayed the rank for the purposes of plot. He's going to be the lead medical officer onboard, so I figured Warrant Officer made the most sense there.
For the character himself now.
Throw an extra section in the description section and add in the details about the wings, please. Mostly just color, you don't need the wingspan unless it's VERY abnormal.
Also in description, I'd like you to add something telling us what kind of hair he has. Is it straight, curly, wavy... possibly something in between?
For skin tone, try using a more detailed description. For example, you can use the word Caucasian to describe the general "white" skin tone most people think of, and then just detail from there with words like tan or pale.
Personality could use a fair bit more detail. Is he a dominant guy, or a bit on the submissive side? What kind of focus does he have (does he put work first, self-satisfaction...)? How does he feel about anyone other than nekos?
Same thing as I told the new guy, expand on the likes and dislikes. What kind of people does he like/dislike, what kind of activities in his spare time, etc.
Made a couple quick spelling changes in history (mostly nekovalkria to nekovalkyrja). Noticed a couple others afterward (come in hand = come in handy, etc.).
Under skills, make sure you add in all of the SAoY standard skill details as well, since he'd be qualified in all of that as well now. The first two sentences of Knowledge should be combined.
Under Inventory, put the standard Yamataian inventory, with the exception of the Power Armor equipment.
Character is pending edits.