Where the hell do you see a Happy ending!?
Her father is a frigging monster!
Yeah, but compare it to Kite. Sawa lost everything. Here, Monaka recognized it was her father and all the strange things he had done made sense after Doi told her it was possible he was one of them. Monaka left the car believing she had killed her father. But then he revived, and the recognized each other again.

As Mukai/Sawa pointed out, Monaka needed to run and stay close to her "special person." They tried to fool us believing she might have a relationship with the cop, but she was always closest to her father. That was pretty clear.

Compared to the bleak and depressing ending of the original Kite, Liberator was a sort of happy ending. At least in a way.

So he's a monster. This is the Kite/Mezzo universe. Mere obstacles.



Edit: I'm pretty sure Oburi is dead as a doornail.