My take on Nam-gyu and Thanos’ dynamic..
Just to preface this is all my opinion! Not canon of course.
I noticed Nam-gyu seeming jealous and possessive whenever Thanos moved onto his next romantic interest. Even going as far as to adopt their characteristics (I think of the hair length). I feel like Nam-Gyu was considering getting a piercing due to Thanos’ outward attraction for Noona (Thank god there were no needles in there). 196 died a little too soon to see any obvious signs but I did notice Nam-gyu staring, likely hoping to pick up any phenotypes he could adopt. This next one is by far my biggest stretch but I believe it with all my heart! The way Nam-gyu approached and hit the blue button with his fist just felt so intentional. Like he was attempting to resemble a drug (with the blue light shining onto his skin). This WOULD make sense since he knows Thanos is a drug addict 🤷♀️🤷🤷♂️ perhaps he was hoping to remind him of a pill. And as a result get consumed later on ;)