Comrades - As mentioned in his Obligations, Mismatch formed deep bonds with both the Jedi and his clone brothers he fought alongside. He was shattered when Order 66 stole the freedom and choice of his brothers, and led to the genocide of the Jedi, and feels a deep sense of loyalty to both. He does anything he can to help his brothers, including removing chips, repairing weapons and armor, and giving away what he can. In the case of the Jedi, he is doggedly loyal and deeply repentant.

Oath - Mismatch, after executing Order 66 and waking up from the control chip to find the Jedi he had fought alongside for nearly three years dead by his - and his brothers' - hands, has sworn to do everything in his power to either reinstate the Jedi Order, or to protect any surviving Jedi until his dying breath. He feels obligated to preserve any and all Jedi culture regardless of the affect obtaining said things may have on his health (mental or physical) and can go out of his way to do anything he feels necessary for said task.

For the most part, Mismatch looks like a standard Clone Trooper - mid-toned skin, black hair that's a bit longer than regulation cut and usually swept to one side, broad shoulders and a sturdy build. The only thing that deviates are his mismatched eyes, which he's had since decanting; one the standard clone brown and the other a bright blue.
His armor paint is a cool reddish-violet hue, although he bears few notable, distinctive markings.