Doc is a clone, one of countless brothers in the Keibatsu army called the Nihilgenia. The advancement of the Kaminoan craft and the rather unorthodox treatment of the clones by the Keibatsu family allowed Doc a hearty measure of independence and decision-making prowess, but in his heart, he is still one of countless brothers in battle. His willingness to lay down his life for his clone brothers or to accomplish their goals would be considered extreme or even unthinkable by most sentients.

Like all other clone soldiers, Doc's genes were adjusted to age at a faster speed than a natural born human. Adding in the stresses and experiences of combat that age the mind and personality, and Doc looks and acts twice as old as he actually is.

Many clones take to differentiating themselves from their brothers by way of tattoos, and Doc is no exception. His left arm is covered in a full sleeve of ink, with every major event, deployment, and brother lost permanently marked on his flesh. Starting at the wrist and going back, the chronicle of his life has made it past his shoulder and is starting to creep across his back. After every intense encounter, Doc makes it a point to find one of several favorite artists and get the mural added to. This leads some to think that he might be addicted to either the inking process or the adrenaline hit from doing something so extreme that it would warrant an addition.

Initially trained as a medic for the Nihilgenia, Doc was given the nickname by his unit after pulling off some nearly miraculous bits of applied medicine in his first tour at Kuroshin. As a result, he was voluntold to go for full training, earning a proper doctorate as he was ordered to do. As much of the knowledge and skill is not really needed as a medic, he is somewhat awkward when in a proper surgical theater just by dint of experience. While the knowledge makes him a better asset to any unit, Doc is quick to remind anyone who asks that he is still first and foremost a soldier, and a quite capable one at that.

After a harrowing battle at Kuroshin and the successful campaign as combat medic for the Nihilgenia, Doc retired his number and was granted his surname as well as a choice of assignment. Opting for retraining as a fighter pilot, Doc was reassigned to the Ninth Nihilgenia aboard the Fallen Spear, where his skillset changed drastically. While he became formidable as a combat pilot, enjoying the high speed and intense realities of space combat, he often misses the comraderie and chaos of his previous life. Given the change in assignment, Doc relishes the rare opportunity to keep sharp in his skills on the battlefield, sometimes seeming too eager to dive into combat, blasters blazing.

The old Traditions of the Mandalorians found new purchase in the Grand Army of the Old Republic, as the Kaminoans used one of them as the stock for their clones. Despite the fact that the Nihilgenia are not created from Jango's genome, their training programs still lean heavily on the famed bounty hunter's skill and history. Of the traditions carried forward, the badge of honor known as Jaig Eyes is likely one of the most fervently adhered to. Having earned the right to wear the symbol on his helmet, Doc is rightfully proud, taking great care in the painting and repainting of the symbol on his helmet. Considering it as equal parts badge of honor and good luck symbol, Doc would be more than hesitant to willfully enter battle without the symbol on his helmet.