First of all I'm so sad that its nearly the end now if there are only 2 arc left(somebody ...

First of all I'm so sad that its nearly the end now if there are only 2 arc left(somebody said so in the below comments ). Secondly i always thought so that yeoryeong will end up with eunho dammmmm and i like them together too.... but, can someone explain to me what this wierd girl is?original ban yeoryeong? og author? and what were those secret men in the haunted house challenge episode????