Mattheus Caliano is a Brazilian voice actor, director, and dublagem professional based in Rio de Janeiro, born on February 13, 2003. He began his career in voice work as a child, providing voices for young characters in live-action films and series, such as Peter Quill as a child in Guardiões da Galáxia and August Matthews in Garota Conhece o Mundo, as well as voicing characters in western animations like the title role in O Pequeno Príncipe and Ben Tennyson in Ben 10.

In the realm of anime, Caliano has secured several leading roles. He voices the protagonist Seth in the adventure series Radiant, a role that marked a significant step in his anime career. He is also the Brazilian Portuguese voice of Lugh Tuatha Dé, the titular assassin in The World's Finest Assassin Gets Reincarnated in Another World as an Aristocrat. Another prominent role is that of Theoto Rikka, a member of the Spearhead Squadron in the mecha anime 86: Eighty Six. His work also includes the character Kippie in the series Glitter Force Doki Doki, as mentioned in the query.

His other anime credits include roles in Black Clover as both the young Rei Mago Julius Novachrono and Neige, as well as parts in No Game, No Life as Tet, and Re:ZERO -Starting Life in Another World- as Hetaro Pearlbaton. He has also taken on voice directing responsibilities, notably for the anime series BLUELOCK and The Devil Is a Part-Timer!, among others, at the Som de Vera Cruz studio.