Juan de la Vara

 is a minor character featured in Red Dead Redemption. He plays a part in both Stranger side-missions "Poppycock" and "Love is the Opiate".

Background
De la Vara is the factory foreman at El Matadero. He is notable for his cruel attitude to employees (binding many of them, including Chinese workers like Zhou, into contracts that are no better than slavery), as well as being a purchaser of opium from Uriah Tollets.

Trivia

 * You can kill him after giving him a white stallion during Love is the Opiate.