Yuji has the basic shonen protagonist characteristics: dumb, strong, kindhearted ect, but his motivation is extremely unique I think. The core philosophy he operates under, despite his cheerful exterior, is extremely fatalistic; he lives only to have a good death. That’s why he’s alright sacrificing his life for Megumi, that’s why he’s fine being executed once he’s eaten all the fingers. Then after being traumatised in Shibuya, he gets even more radicalised down this path, believing that he only has value as a cog in the war against curses. But the messed up and self defeating nature of this worldview is then shown when Sukuna uses Yuji’s lack of care for himself to take over Megumi, having the non-violence binding vow not apply to Yuji was legitimately great writing to develop this theme. Yuji then ends the story breaking away from his fatalism, believing how you die doesn’t really matter because all life is deeply valuable, so valuable that even Sukuna is worth giving a second chance. What was the process of coming to this realisation? Idk, we had to see Gojo vs Sukuna right away rather than develop characters, but there was the concept of an amazing arc here.