Jessy Cuevas is brother of Cesar Cuevas and Matty Cuevas. He is a hunter that has been on the run for 7 years in hunting supernaturals to avenge his brother Matty death.
History
Early life
In 1989, when he was 12 years old, a Bisaan abducted his brother Matty when they went fishing on a creek. For many years he told people about his sighting about strange creature that abduct Matty, however Sheriff Cochran that investigated it hide the fact about it and covered it in order to cover her daughter actions and involvement during the incident. It make the case leaved abandoned 27 years later.
At some point, he began interested with supernatural hunting. In 2009, he began work together with his brother, Cesar. They operated from Mexico to Texas since then. Realizing when the Bisaans returned in 2016 to attacking peoples at their home town, they return from their operating area to end the Bisaans problem forever.
Season 11
When Dean tracked impregnated Libby in the forest, he ambushed by a male Bisaan. Dean nearly losing the brawl, but thanks to Cesar assist, the Bisaan can be decapitated. Jessy later come and stabbed the Bisaan torso multiple times just to make it sure if the creature was really killed.
They later shared about their knowledge about Bisaan to the Winchester and how to dealed with them. He later teamed up with Sam to track down the Cochran about what really happened 27 years ago. When realized if everything Cochran did was for keeping his daughter actions and learned if he killed the daughter, causing Jessy's outrage. Cochran later revealed the location of the Bisaan lair. When they come to the place, they found if Dean and Cesar already finished all of the Bisaan. They later found found the corpse of Matty and many the Bisaan victim. After locating them, they give all of them the proper Hunter funeral pyre rite to all of the fallen victim and destroy the Bisaan lair.
In aftermath, the Cuevas later retired from the hunter works and returned to their home in Mexico.