Karehaan カレハーン

Karehaan is the first of the Dark Fall to attack Earth. He is sent to capture Flappy and Choppy in order to force them to tell where the Fountain of Sun is. Karehaan transforms wood-related objects into Uzainaa monsters, and he appears plant-like himself. His name comes from the word "kareha", which is Japanese for "dead leaves".

(Source Wikipedia)