I'm going to spoiler a lot of the details below and the image I drew because it pertains to information in the anime Attack on Titan and I don't want to spoil anything for anyone who hasn't watched it or gotten far enough in.

Ok so this is my Titan Shifter OC named Siegfried Koch, he inherited the Armored Titan powers and unlike the Armored Titan in the show his build is a lot more skinny and lanky...think like...Erens Titan but leaner/skinnier and you've got Siegs titan. He's also about a meter or two shorter than the 15m Armored Titan in the show. His hair reaches just past his pecks but I couldn't really draw it well enough in the original picture. Lastly his titans expression is tired/exhausted looking with a bit of sadness added on. Anyways here is my rendition.

https://preview.redd.it/bptfqxsjrim61.jpg?width=3000&format=pjpg&auto=webp&v=enabled&s=ead474720797e832feaa01fc63560da6db4a2110