Yeah, you'll get the chance to pick the other Hakuno you didn't get initially when you can re-do OC3 once it gets added to the game permanently in... April-ish? of next year.
And you're forgetting that they explicitly stated that if she hadn't already had such thoughts that the Goddess wouldn't have been able to take her over and do so.
In summary:
THIS FLASHBACK HAS BEEN GOING FOR TEN THOUSAND YEARS CAN WE MOVE THE FUCK ON PLEASE
Now we wait to find out if, much like the Spirit Bomb, it will fail to actually do anything :kek: (I'm not counting the Buu Saga one because Toriyama wanted to end the show after the Cell Saga, iirc)
The actual reason is, when she's singing for herself/selfish reasons, she sounds god-awful. When she's singing for others, it sounds good. Yes, this is the actual reason and it was discovered in-game during a Halloween event.
I don't think they have a choice, when practically the entirety of the Throne of Heroes will mobilize to flatten them if they harm a hair on Ritsuka's head. A not-insignificant chunk of them have said in-game that they will break the rules for us, consequences be damned.
In the words of Deadpool: Fighty time, fighty time, blood blood blood~
He said 'to an extent', I don't think she can go quite that far. So, unfortunately, no dragon Metroplex in our future I don't think.
Or maybe stop coming up with plans that assume you'll be able to maintain contact, because it has been proven repeatedly that a frog farting three continents over will sever Chaldea's communications with Ritsuka; y'all need to quit thinking that surely this time it will stay stable.