Amiina (formerly Amína, stylized in lowercase) is an Icelandic band composed of members

Maria Huld Markan Sigfúsdóttir, and Sólrún Sumarliðadóttir, Magnús Trygvason Eliassen and Guðmundur Vignir Karlsson. In the past they have frequently performed live and in the studio with Sigur Rós.Their music is made with a great number of instruments. It contains elements of minimalistic style, contemporary classical, ambient, and electronic loops. In their performances each member will play many instruments, sometimes moving across the stage, going from one instrument to another mid-song.

Source: Wikipedia (https://en.wikipedia.org/wiki/Amiina)