Here is the personality and background for Kristoff. Hope this meets your criteria.
Kristoff is your traditional soldier build, broad shoulders and well muscled. He has dark brown hair with hazel eyes.
Kristoff is somewhat blinded by the "Imperial Way". He believes that order through force is the way to do things. Like most imperial citizens he is fairly racist, if you aren't human or at least close to, you are a second class citizen and will be treated as such.
Born and raised on Coruscant he grew up in a life of relative luxury, his parents being fairly successful business people. He always was fascinated by the soldiers he saw around and since his older siblings were already getting into the family business his parents encouraged him to pursue his dreams. He joined the Imperial corps as soon as he was able. He was recognized as a superior soldier and has recently been given special ops training. He was off-world training when the Deathstar destruction happened and has now joined up with his troop with the forces of Mirianna Palpatine, swearing allegiance to her in order to try and restore order after the rebel scum have created such chaos.