Kalle, which is said to have a Nordic soul, is composed of singer Veronika Buriánková and guitarist David Zeman. The band has nominations for Vinylo, Andel and Apollo. They have both played in other formations: Veronika and David stood behind the band Veen, with their friends playing in the post-metal band Nod Nod.
The name Kalle (Nordic Karel) originated spontaneously. Originally not intended to concentrate on Scandinavia, the aim was to create a name that would not define the band. "We were looking for a combination of letters that make up a certain accent. Kalle liked us at the first utterance. When we found that it was a typical Norwegian name, and in translation it means something like cold, in some languages death, we did not mind," explains the singer. The Tábor couple was looking for something likable but did not want it to define the content, because it could change over the years.