Just a quick update, and video of a shading progress for a character I play in a Marvel Exiles RPG on alternating Fridays.

Her name is Jonna Proudstar. In her universe she is the daughter of Forge and Warpath. She is technically a clone of the two men, but that starts to get convoluted really quick xD.
The Sentinel and Trask S.H.I.E.L.D logo are mimic designs. The Sentinel being modeled after the X-Men: Days of Future Past movie with some minor & major tweaks to the design. The Logo is a blend of the Trask & S.H.I.E.L.D logos.

If you would like to see the sketch shading process of the Sentinel you can over at my youtube channel.
https://www.youtube.com/user/ankhspaw