Shinoa became my instant favorite character back when I first started reading the Seraph of the End manga back in summer of 2014. When the manga was being adapted into an anime, I knew I had Cosplay her!
Wig was purchased off amazon and TricksterRedux was nice enough to cut, style, and add the ribbon to the wig so it's more accurate.
Uniform was purchased off of ebay
Socks and shoes? Just got them at your local shoe store. To keep the socks from slipping or falling, I used sock-glue, or "sock-tachi" as they call it in Japan to keep them in place. Those were purchased off J-List. They also come in different scents as well.
How to put on spread sock-glue is simple: spread the glue all over your legs and then put on the socks over them so that they stick and look natural! It's water-based so no worries about ripping your skin off once you take off the socks, haha.