Melanie Martinez has built a devoted fan base, known as the "K-12" community, who appreciate her music's emotional depth, sonic innovation, and unapologetic exploration of complex themes. Her influence can be seen in many contemporary artists, and she continues to inspire a new generation of musicians and fans alike.

Martinez is known for her captivating live performances, which often feature elaborate costumes, theatrical sets, and a strong emphasis on visual storytelling. Her music videos, such as "Dollhouse" and "Lily," have garnered millions of views on YouTube, showcasing her creative vision and aesthetic.