*Lake Müller was a contestant on Disventure Camp 2 as a member of the Orange Team. She returned as a contestant in Disventure Camp: All-Stars as a member of the Cyan Team.

Lake is a tall young girl that has pale skin and gray eyes. She is actually bald, but originally wore a medium length light blonde wig with a lock that covers part of the forehead and an orange flower on the right side until Not As Easy As It Seems, where she starts wearing a short red wig with dark red streaks for the rest of the franchise and admits that she likes the new one better than the old one. She wears a dark teal blouse with a white shirt underneath, a short black skirt, white over the knee socks with a horizontal black line at the top and black shoes. Because of her parents' choice, she has very pale, near white complexion. According to an official post, Lake is 6'1/1.86cm tall. However, in 2023 her height was stated as 5'8/1.77cm, which matches her height in animation more.

In Disventure Camp: All-Stars, her new wig is now brighter in color, is trimmed, has sidelocks and has an orange flower on the right side. She is now wearing a different dark teal blouse, black and gray shorts, white socks that are just below the knee with a horizontal light blue line at the top and dark teal and white sneakers. Her skin tone darkened a bit.

Lake is a kind, polite, and helpful girl. Due to her parents raising her to be a perfectionist all her life, she had to study a lot, be told what clothes she would wear and what she could and couldn't eat. Thus, at first, Lake originally had no control over her own decisions and would even have to complete essays and send them to her tutor while competing on the show. However, thanks to her newfound friendships, while her personality remains mostly the same, Lake would become less reliant on her parents and start to feel more confident, independent and liberated.*