Fumadayo
Where after Jongwoo killed everyone in the Eden residence then killed Moon-jo, he moved back to Busan, cut everyone off, and changed his name to Myung-gi. Eventually after Myung-gi went into debt, and went into the squid game, he noticed a triangle guard staring at him continuously, and giving him praise after he won a game. The after the bedroom fight, that guard got shot by player 120, Hyun-ju, and she threatened to kill him if he didn't tell her and Gi-hun their plans, when the guard refused, Myung-gi yanked the guard's mask off, being met with those same brown eyes in 2019...It was Moon-jo