There are two bands known as Pretty:
1) Pretty was formed by Nikki Nails (formerly of River Rats, Slut, St. Anthony's Fire) in 2006. Random Hajile (Maniac Nightmare) later joined the band to provide backup vocals, and synth.
2) Pretty is a shoegaze band consisting of Lewis Guillen and Summer Bradshaw from Kansas. They released their debut EP in 2013.