Briner was born and raised in Maryland. He attended University of North Texas and studied theater prior to finding voice-acting work.[3] In 2015, he starred as the voice of Mikaela Hyakuya, one of the two main teenage orphans who turns into a vampire in the anime series Seraph of the End, which was released through Funimation’s broadcast dub service.[4] He voiced Elam, a boy who serves Arslan’s main party member Narsus, in The Heroic Legend of Arslan.[5] He voiced main protagonist Qwenthur Barbotage in the mech-themed anime show Heavy Object. A reviewer wrote on Anime UK News that she was impressed with the quality of the dub and that Briner and fellow voice actor Micah Solusod “have a lot to do with how instantly likably the characters come across, which helps carry the whole show”.[6]

In video games, Briner voiced Ichi, the love interest of the main character, in Cibele, an indie video game about developing an online relationship. Cibele won a Nuovo Award at 2016 Independent Games Festival,[7][8] and made Briner’s name known in mainstream news.[8][9]

In My Hero Academia, Briner voiced the lead character Izuku Midoriya, a middle school student who was not born with superhero powers but lives in a superhero-based world, and is recruited to enroll in a school for superheroes. Alex Osborn of IGN described his performance as excellent and standout,[10] while Tom Speelman of Polygon noted that he and his Japanese counterpart “nail the optimistic nerdiness and heroic attitude” with Briner “channeling a bit of Morty Smith for good measure”.[11] The series has run for three seasons, with Briner and fellow voice actor Christopher Sabat doing panels and interviews at anime conventions including Anime Expo and San Diego Comic-Con regarding their work on the show.[12][13]

Briner has continued to voice lead and main characters in other anime shows. He voiced Alfonso San Valiante the crown prince in the first Garo: The Animation series, which Robert Prentice of Three If By Space described the English cast “a great lineup”, in particular highlighting Briner.[14] In 2016, voiced Lance in the anime adaptation of Puzzle & Dragons X,[15] and Nasu no Yoichi in the alternate history anime Drifters.[16] In the prison comedy Nanbaka, his vocal performance was described as “more awestruck and childlike” than that of the original Japanese counterpart.[17] Anne Laurenroth of Anime News Network found Briner’s portrayal of Kensuke Hanasaki in Trickster helped prevent his pre-backstory character from getting overly annoying.[18] Briner has also been involved in the production side as the head writer on the ADR script for Rio: Rainbow Gate.[19]

In 2017, he voiced lead characters Haruki Mishima in Convenience Store Boy Friends, Tazuna Takatsuki in Hand Shakers, and Ernesti “Eru” Echavalier in Knight’s & Magic.[20][21] In the same year, he landed the lead role of Justice “Seigi” Akatsuka in Taboo Tattoo.[22][23]