Robby Gemaehlich, also known as Robert Gemaehlich, is an actor and voice actor based in Brooklyn, New York. He was raised in Weston, Texas, and began his professional acting career at the Shakespeare Festival of Dallas at the age of nineteen. His background includes extensive work with professional theatre companies, and he is a member of Actor's Equity. In 2022, he began training with The Barrow Group in New York City. His voice-over career started at Funimation Studios, where he initially performed bit roles before advancing to series regular parts.

Gemaehlich is best known for his work in English dub productions of anime series. His most prominent voice role is as Nikkari Aoe in the anime series Touken Ranbu: Hanamaru, which aired from 2016 to 2018. Nikkari Aoe is a wakizashi, or short sword, personified as a character in the franchise. In the English adaptation of the show, he voices this role across multiple episodes. Other voice credits include the character Noma in the anime series Golden Kamuy, as well as providing additional voices for other projects.

Production and casting records indicate that Gemaehlich has worked with ADR Director Jad Saxton and scriptwriter Clint Bickham on the Funimation dub of Touken Ranbu: Hanamaru. During this production, he was part of a large ensemble cast that included voice actors such as Dallas Reid, Ian Sinclair, and Jason Liebrecht. A recurring collaboration can be seen with fellow voice actor Ian Sinclair, who also voiced multiple characters in the same series. His work is primarily associated with Funimation Studios in Texas, where he recorded for several anime dubs early in his voice-over career.