Osvaldo Delgado Flores 'El Mariana'

July 23, 1998 — Matamoros, Tamaulipas, Mexico

Osvaldo Palacios Flores (Matamoros, July 23, 1998), better known as El Mariana, is a Mexican streamer, YouTuber and tiktoker. He is the protagonist of the documentary El Cuarto Round (2024). He also participated in the Latin Spanish dubbing of Five Nights at Freddy's (2023), voicing the character Jeff.