Sarah Ruth Thomas is a voice actor known for her work in English-language dubs of anime. She hails from the state of Texas and has a background in performing arts that includes work as a singer, dancer, and actor from a young age, with experience in theatrical productions ranging from Shakespeare to musical theater. In addition to voice acting, her professional focus extends to video games, podcasts, audio dramas, and original animations.

Thomas is recognized for her role as Anko Koshi in the English dub of the anime series My Deer Friend Nokotan. The series, which premiered in 2024, follows former delinquent Torako Koshi and her unusual encounter with a half-deer, half-human girl named Noko Shikanoko. Anko Koshi is the younger sister of Torako and a member of her school's Deer Club. The character is notable for her intense and obsessive devotion to her older sister. Thomas was credited for this role across all twelve episodes of the series' English dub, which was produced for streaming platforms. In the original Japanese version, the character is voiced by Rui Tanabe.

Based on available records, her role as Anko Koshi in My Deer Friend Nokotan appears to be her primary credit in anime voice acting. No other major anime roles, recurring collaborations with specific directors or studios, or notable industry achievements such as award nominations are documented in available sources.