Sprunki began as a fan-made, Incredibox-inspired music game where players build beats by assigning loops to colourful characters, and its community soon started creating original characters of their own. Millie is one of those fan-made original characters, and Normal Mode refers to her standard, non-horror form, the version most creators use for regular mixes and showcases. Short clips like this one circulate on soundboards and fan videos, letting other players hear an original character without building a full mix, and helping a new character gain recognition across the Sprunki community.