Biscuit is an English Bull Terrier mix who is a rescue dog from Georgia. She was brought up to Maine by the UnderHound Railroad group. Dmitry and Biscuit started making TikTok during the pandemic January 2021. Together, they are known as MisterMainer on TikTok. They both live in Midcoast region of Maine, United States. Biscuit enjoys daily walks with Dmitry and running around the backyard. MisterMainer is also an ambassador for Taakoboutit, a Canadian dog gear company.