Huh, lotta back and forth here. Hope it comes together well, as opposed to doing what HxH did in giving an entire episode for the backstory of some dictator only to immediately kill him the next episode.
Robin backstory is out of left field, especially so from the perspective of someone we’ve never seen before. Considering Robin’s pedigree I wouldn’t be surprised to see him being tangentially related to the facility, but it would take more than a tangential relation to make him intrinsically relevant all these years later. So either his family was a big fish in the facility, or he’s going to show up in the next arc. Or both.
The politician stuff is even more cryptic, but the same reasoning applies. Even if they’re not ideologically aligned with the creation of paradise, they could well have had investments in the brain transfer bullshit or helped conceal the sketchy research. Or both.
I’m pretty sure sis is the only known case of a successful brain transplant. Having another one of them show up, especially from some corrupt old bastard, wouldn’t surprise me at all. It’s not like they had to be transplanted into a designer baby, nor is it known that Kona and co. were the first/only group of them.