>>543295698
Rean is the sacrifice, but Ash was a sacrifice needed to kick start the Great Twilight.
>>543295956
The confusion stems from Rean being called the sacrifice in CS4, but Ash/Eugent were just meant to be a sacrifice to allow the Great Twilight to happen. The difference between the and a.
>>543295786
It's where I looked as well to be sure, but at the same time I think the wiki gets it a little bit wrong with the wording. I'm pretty sure this is the interview they're referring to
https://gu4n.medium.com/trails-of-cold-steel-iv-spoiler-ridden-interview-with-kondo-toshihiro-3fed57af363
and the pertinent answer is
>It’s fundamentally entwined with Ishmelga. When Rean’s family home was attacked, Osborne borrowed Ishmelga's strength to transplant his heart into Rean. On that moment, the factor of Ishmelga served as intermediary and took root within Rean. In addition, it combined with the latent potential that already existed in Rean and gave rise to the to the ogre power.
It wasn't that Osborne fell to the curse, but that Ishmelga just used his power to perform the heart transplant.