my theory is that bada has cleared the game before but hes still in the game for some reason which could explain why he was so good at solving the puzzles and knowing a lot about games like this but i really hope hes not an npc
They are probably not the only player Bada met if that's the case. Like npc that always stick around from the start until you finish. Like those npc, Bada might be the same if that's the case.
my theory is that bada has cleared the game before but hes still in the game for some reason which could explain why he was so good at solving the puzzles and knowing a lot about games like this but i really hope hes not an npc