I think his load can also be used as ammo to fuel Ayaka's glasses, functioning as a sort of machine, like Jinx from lol.
Oh, this random comment led me to an epiphany about Fake Ayaka's identity.
Spoiler:
When messing with Zelretch in volume 1, the finishing touch that lets Caubac secure his timeline is giving the intruder glasses. Zelretch asks why the glasses are important and Caubac says he doesn't know, that was simply the starting point back-calculated from his designated finish