[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.

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".

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".

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.

[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.