Souma Jace

"That Old World without Her, nobody remembers but me."

- Origin: Principality of Libyre
- Birthday: August 18
- Height: 171cm
- Likes: Oysters
- Dislikes: Herbs
- Will/Gem: "Six Striations of Memory and Oblivion" Emerald Star Aletheia

The original story's protagonist.
He was at risk of being expelled from Academia after losing his Sapphire Will, but then he acquired a new Gem after touching the Emerald Tablet.
During that time, he sensed an ill omen after taking a glimpse of the "Old Future", which raised his interest in going into the Depths.