Renan Alonso is a Brazilian voice actor recognized for his work in the dubbing of numerous anime series. He is active in the industry both as a performer and as a dubbing director.

Alonso has lent his voice to a wide array of characters, demonstrating his range across different genres. He voices the determined and often embattled Naofumi Iwatani in the series The Rising of The Shield Hero and its second season. In the world of Dr. Stone, he is the voice of the enthusiastic and inquisitive Chrome, a role he has performed since the series' early episodes and continued through to the third season, Dr. Stone: New World. He also portrays Paul Greyrat, the father of the protagonist, in Mushoku Tensei: Jobless Reincarnation.

His other prominent roles include the arrogant but devoted lizardman Gabiru in That Time I Got Reincarnated as a Slime, the mysterious elf architect Dearia in Dragon Goes House-Hunting, and the cheerful Genta Doi in Hi Score Girl and Hi Score Girl II. Alonso also voices the titular character Vanitas in The Case Study of Vanitas.

Beyond these, his extensive filmography includes roles such as Shinichi Sakurai in Uzaki-chan Wants to Hang Out!, Takezō Kurata in Kono Oto Tomare!: Sounds of Time, KR in Log Horizon: Destruction of the Round Table, Akiya Shirakawa in Kageki Shojo!!, the narrator in Baki, Jhin Syulargun in Our Last Crusade or the Rise of a New World, and Carlo Levamme in The Princess and the Pilot.

In addition to his acting work, Renan Alonso has taken on directorial responsibilities. Notably, he served as the dubbing director for the third season of Dr. Stone, a role he held while also continuing to voice the character Chrome. His work is frequently associated with dubbing studios in São Paulo, such as Atma Entretenimento.