Adel was likely an exported character from Xenogears. If you didn't know, FF8 was rushed for a holiday release with help from the Xenogears team.

Adel, I believe, is essentially Id. Obviously there's incompatible story elements with the final version. But there are beats, like the carbon freezing that match up.
Or how the Zeboim civilization had this prophesied messiah character that would lead them to a "New Horizon". The Esthar Scientists, once freed, created "Fisherman's Horizon".