He's Cyrell Bonn, a young pantoran jedi, a very gentle and kind soul, not very fight inclined, he's more focused on the ways of the Force.
A few years before the Clone Wars he was sent on a solo mission to a planet with a rich history and culture but there was an uprising against the government who basically colonized the planet and kept robbing the native people of their cultural and historical artefacts and treasures, the leadership being obsessed with art, seeing it as a sign of wealth, and hording it.
Their upper circle also had an "artist", someone belonging to the Iskalloni species, but he left their planet and people who live in isolation because his views didn't match with the rest of them who look down on other species, especially humanoids, but he, unlike them saw the beauty in other life forms. Sadly, he expresses his admiration in twisted ways, turning living beings, mostly creatures so far into 'works of art'. Basically turning them into cyborgs. There were rumors of his doings within the people, but no one knew for certain what happened within the palace walls.
Cyrell was sent to solve the conflict within the native people and their government and reach a compromise but while he tried to speak to the leadership the 'artist' spotted him and this sealed his fate. He was invited to stay at the palace during the negotiations and then got sedated and captured...
It took weeks for the 'artist' to turn half his body to a machine and probably he would have gone even further if the people didn't see the disappearance of the jedi trying to help them and the lies that followed it as the last straw and they finally attacked the palace. They massacred or captured most of the leadership and their court, killing the 'artist' as well and then they found poor Cyrell in a half consious state, his body butchered and rebuilt...
The adjustment and recovery was slow and painful. But even after finally returning home to the temple, he couldn't rest, he had to face prejudice from his peers. How could someone keep their humanity when they weren't even fully human anymore...? Insults like "half a jedi" flew his way often, some younglings were even scared of him and he felt ostracized. Yet he did his best.
