From Wikipedia:
Laura Laß (born March 22, 1984 in Berlin, real name: Laura Gettwart) is a former German actress and voice actress.
as Dorothee Jagel(1 ep)
as Jennifer Brinkmann(1 ep)
as Marie Seidel(1 ep)
as Katharina Börner(61 eps)
as Birka Oxenberg(1 ep)
as Nathalie(2 eps)
as Kati(1 ep)
as Katrin Lemke(1 ep)