your guess on who tweeted after the mv? is it jin? hobi? and how do you know
it’s jin imo. the only 3 people can call namjoon “namjoonie” is jin, yoongi and hoseok. if it’s hoseok, he would typically use a space followed by 2 or 3 exclamation marks. it sounds too cute for yoongi’s way of talking (말투). jin usually uses “fighting” and this has the same format as the tweet he posted that day he went to play the claw machine.