Have MAJOR changes in Yuri Tysendal character design and background story

Yuri was an human Earthling Elite Scout Officer from the Galactic Star Force. However during one of his routine scouting on Planet Vorsch with the natives (a centaur-type humanoids whom called themselves Calith), they were ambush and Yuri was fatally wounded.
The dying Yuri was taken by the Star Force and subjected him Project Sagittarius where his missing lower torso attached to a killed Calith, hoping it will give a necessary accessibility on Planet Vorsh (including breathing the planet air and the certain terrain where it's impossible for any vehicles to pass). His missing limbs were replaced by mechanical ones.