Okay so here’s the run down of the world building: destitute rebels and the elite initiate civil war for differing reasons. No side truly wins, the elite launches their project the Utopian megastructure: a new, restarted society above the war torn wastelands while everything rots below. Over the next 200 years, the wastelanders and utopians have a mutual beef, yet locked in stalemate, though tensions grow when Utopia attempts to reclaim the wastes via terraforming and killing any of the wastelanders in the path.

Shrapnel lore run down: Drafted into war, loses his family, kidnapped by war scientists and subject to their experiments (gas mask with a strange serum air locked to his face makes him unable to die of genetic disorders, disease, old age, blood loss, etc.) and becomes the ultimate soldier. after the experiment, he fights back in the war again and loses his arm. he goes haywire and slaughters the enemies without fear and then kills his teammates (favourite part of his lore) becoming subject to a national manhunt from both sides, which ends when the war ends.

His character development in the main story is supposed to go from: 

Insane nihilist that wants utopia to fall, a rightful cause, but only does it for his own selfish reasons and would destroy humanity if it meant destroying utopia

 \-> to -> 

Someone who prioritises the greater good instead of personal vengeance, and is willing to use his wasted life for good. This development comes from the people he surrounds himself with, who are the 2 other protagonists i have not shown yet and Ξ, who you may or may not know (he shares a lot of similarities with shrapnel, yet so different at the same time).

My problem is the family loss thing. There wouldnt really be any more space to develop his loss further since his personality became a blank slate of nihilism after the war. It also feels very cookie cutter, just very generic to me and overdone, so im looking for help to write his character better.

Help with Shrapnel’s lore