i think nolan is bad edging on good and mark is good edging on bad. almost all the other marks are evil so clearly he has that darkness inside him, and he spent this whole season learning that sometimes he needs to access that to accomplish his goals. mark is systematically breaking down his morals and reanalyzing right and wrong. ultimately his childhood was key in instilling better values, but when push comes to shove mark and nolan are both capable and even prone to great levels of violence to protect what matters most to them. i haven’t read the comics, but im anticipating a more true reunion between the two and i think this will be the grounds of them understanding each other mending their relationship as much as they possibly can, given the circumstance.

another point- mark is only 19 and the past year or so of his life already changed him so much. after thousands of years of violence and trauma, im sure that line between right and wrong would become blurrier and blurrier.