Rosa Maria Koolhoven, aka Nika, had already gained appreciation in the Dutch dubstep community for her work as a photographer at various events when she started her Dj carreer. In June 2008 she had her first gig at Dubstance III in Heerlen, after only a couple of weeks practice. Nika is also responsible for designing the flyer of every Radical event and much of the graphic work Radical puts out. Nika's influences contain various dubstep artists, alongside commercial as well as under ground music such as M.I.A. The name Nika is a reference to her Nicaraguan background.