LogFAQs > #962491461

Primals are essentially little mini deities summoned by beast tribes. They had been more traditional ff summons(ifrit, garuda, titan, etc).

Its gone beyond that since then but the gist of it is that anyone that comes into contact with them falls under their thrall.

Its had varying results, short exposure essentially leaving characters in a near zombified state to full enthrallment with more exposure.