Lucas Viana is a Brazilian voice actor, broadcaster, and content producer known for his work in dubbing anime into Portuguese. Born in Santos, São Paulo, he initially studied Systems Analysis and Development before pursuing his dream of becoming a voice actor, which led him to train in theater and then specialize in voice acting.

He began his professional career in 2020, with his first role being minor characters in the anime My Hero Academia. Viana has since built a diverse portfolio of significant roles in popular anime series. According to the Anime News Network encyclopedia, his credits include Kōtarō Takebayashi in Assassination Classroom, Yū in Fire Force, Hayato Ikejiri in Haikyu!!, and Lichtendahl Tsery in Mobile Suit Gundam 00 and its film sequel. He is also known for his portrayal of Keiichi Maebara in both Higurashi: When They Cry – GOU and Higurashi: When They Cry – SOTSU.

In the series Requiem of the Rose King, Viana voices the character Henry Stafford. He also plays Miya Chinen, a young prodigy skateboarder, in the Brazilian Portuguese dubs of the anime SK8 the Infinity and its OVA, SK8 the Infinity Extra Part, produced by the Dubrasil studio.

Beyond his work in professional studio dubbing, Viana has carved a unique niche by creating online content that combines his two passions: voice acting and Korean pop music. He produces and dubs Portuguese-language versions of videos and live streams of K-pop idols, an effort he considers a form of accessibility for Brazilian fans who may not understand Korean or read subtitles. This social media work has led to collaborations with artists such as the girl group XG.