aespa (/ˈɛsˌpɑː/ ES-pah; Korean: 에스파; RR: Eseupa, stylized in all lowercase or as æspa) is a South Korean girl group formed by SM Entertainment. The group consists of four members: Karina, Giselle, Winter, and Ningning. The group is known for popularizing the metaverse concept and hyperpop music in K-pop.