I just wanted Quarian renegade badass, who created fear around him that even Quarian can have villains that's why only Daro'Xen respect him and Han'Gerrel at least admit his fearless cruelty as very effective no matter how psychically damaged he is. (cause he can save every Quarian on Pilgrimage at ANY cost, with own Krogan and Turian platoons loyal to death, slavers completely stopped catching young Quarians: especially after he exterminated whole slaver's family, kids included, when he cant find slaver specialized on Quarian females). He sacrificed his own soul to help his people and trying destroy all evilness by worse evilness
I was deeply inspired by Fallout 3 evil ending in making him: (with mass effect changes)
[EVIL]: The Galaxy praved a cruel, inhospitable place and the Quarian pilgrim ultimately surrendered to the vices that had claimed so many others. Selfishness, greed, and cruelty guided this lost soul. These were the values that guided a lost soul through countless trials and triumphs.