/t/a-list-of-the-most-used-names-of-the-people-in-the-lineage-by-generation/1643
He was an apprentice of don Juan and the other senior sorcerers, just like Carlos.
But when Carlos wasn’t able to follow him on some of his deep excursions into the second attention, he became disheartened.
This would indicate that he was supposed to be a courier to Carlos.
Ultimately, it was this information that eventually led to the knowledge that Carlos was only a three-pronged Nagual; other than the fact that 1 or 2 of the other apprentices were unable to enter into heightened awareness (on their own?).
As a result, Eligio formally joined/aligned himself with don Juan’s party and presumably left with them.