Erma is a fantasy-dark comedy slice of life webtoon created by Mexican artist Brandon J. Santiago. The follows the adventures and misadventures of the titular eight-year-old Erma Williams' experiences as a half-human, half-yōkai/half-ghost, tending to use her haunting abilities for everyday antics, whether for better or for worse, focusing on themes such as friendship and acceptance. Santiago initially published the webcomic on DeviantArt and Tumblr in May 2014, but has since released it on various services from January 2016, such as Tapas and WEBTOON. It is available in two languages, English and Spanish. In January 2020, Comics Beat reported that with 64.5 million views and 74.9 thousand subscribers, Erma was the most-viewed webcomic on the Tapas syndicate in 2019.