In Quinceañera, Carlos is Magdalena’s cousin.
Carlos becomes important after Magdalena’s family rejects her because she is pregnant before her celebration. He and his older friend, Auntie Tomás, give her a place to stay and help her navigate the consequences of the family conflict. Their household becomes an alternative support system.
The relationship is significant because the film presents family as more than a matter of strict approval. Biological relatives can disagree or exclude someone, while chosen and extended family members can provide care and protection.
Carlos is sometimes mistaken for Magdalena’s brother because they are close and share family connections. The film identifies him as her cousin. Jesse Garcia portrays Carlos, while Emily Rios portrays Magdalena.