Hm, it seems like that Io's father is not on Earth but locked up somewhere in the Eye of Aung. Family reunion incoming?
EDIT: Remember, Io doesn't have any proof that her father is on Earth. She's not even following a lead of some obscure rumor; it's only her
intuition that's guiding her. If Io's father actually on Earth, then why wasn't AUNG dealt with earlier? He couldn't convince anyone?
Anyway...Io as a fiancee? That's the best pairing. Too bad MC fucked most of the girls in the group so it would troublesome if Io reveals the engagement to them now, lol.