Iris Schleuss is a German puppeteer who performed Lena on Sesamstrasse, as well as minor guest characters. In the TV movie Das Geheimnis der Blumenfabrik (expanded from the Sesamstrasse spin-off Eine Möhre für Zwei), she plays the squirrel, Knuspel. She also performed on the 1994 Creature Shop-effects film The Neverending Story III, assisting on Junior Rockchewer, Unlucky Rabbit and others. Since 1996, Schleuss has performed many characters on the puppet series Käpt'n Blaubär, including Karin the flower. She has performed stage puppet shows for both children and adults.