Robert Gemaehlich, sometimes credited as Robby Gemaehlich, is an actor and voice actor known for his work in English-language dubs of Japanese anime. His professional background includes extensive work in theatre. He began his acting career at the Shakespeare Festival of Dallas at the age of nineteen and has since performed with numerous professional theatre companies, becoming a member of Actor's Equity. His voice-over career began at FUNimation Studios, where he initially played bit roles before being cast in more prominent parts.

Gemaehlich is best known for his role as the voice of Nikkari Aoe in the English dub of the anime series Touken Ranbu: Hanamaru. Nikkari Aoe is a wakizashi sword brought to life as a character known as a Touken Danshi. The character has green hair and red eyes, and his name is derived from a legend involving a ghost with a creepy grin. Gemaehlich voiced this role in the first season of the series, which aired in 2016, as well as in the second season, Zoku Touken Ranbu: Hanamaru. The English dub was directed by Jad Saxton.

Information on further major voice roles or recurring professional collaborations is not readily available. He has pursued ongoing acting training, including studies at The Barrow Group in New York City beginning in 2022, focusing on scene study and professional acting intensives. Raised in Texas, he eventually relocated to Brooklyn, New York. Additional voice credits include minor roles and providing additional voices for various projects, though details on specific characters or series are not available. No information on notable awards or other achievements in anime voice acting has been found.