There is nothing known about his early history.
Throughout From Dusk Till Dawn: The SeriesEdit
He is alongside Ramon when he shoots at Freddie as to allow the RV to cross the border and after this, he, Carlos and Ramon drive off.
Later, they interrogate Freddie after capturing him. He holds two electric wires when Ramon urinates on Freddie. After Freddie lets Ulises shoot Ramon multiple times, Freddie shoots both of his eyes out, leading him to fall to the ground. After Freddie stakes Ramon, Ulises bares his fangs and goes after him, but Freddie decapitates him, killing him, but his body is sort of alive as he keeps trying to get Freddie until he stops.
Ulises had short, slick-backed dark brown hair and light brown eyes. He wore a black shirt with a cross-like design on it.
He is shown to be quiet, but has a ruthless side as he had no qualms in torturing Freddie and killing him.
|From Dusk Till Dawn: The Series: Season One|
|"Pilot":||"Blood Runs Thick":||"Mistress":||"Let's Get Rambling":||"Self Contained":||"Place of Dead Roads":||"Pandemonium":||"La Conquista":||"Boxman":||"The Take":|
- Ulises is the Spanish form of Ulysses.