Sophia Totterman (born September 23, 2004), known on YouTube as LtCorbis, or LieutenantCorbis or just Corbis, is an young American YouTuber who is known for a mature style of humor that far exceeds her age. With a newer channel that started in August 2015, her content is focused on satirical commentary around popular YouTube figures as well as her personal life. Her older brother makes recurring appearances in her videos, and has a role in almost all of her livestreams.
Corbis's first video was posted on December 23, 2015. A video posted on February 1, 2016 highlighted the Fine Bros. React World controversy.
Almost a month later, on March 10, she received attention from pyrocynical on reddit when one of her videos was a top post. Pyrocynical would then mention her in his own video which later on made LtCorbis one of the most well-known commentators in the commentary community.