Müllerchen was born in Seiffen, Germany. He is an optimistic extrovert and an explorer at heart, filled with the spirit of exploration and a passion for life. He combines a belief in his strength and ability to achieve anything with his thirst for seeing the world - wanting to learn and be influenced by cultures around the world.

Koo is an intelligent, patient and loyal bird who met Müllerchen in the forests of Seiffen. Koo is one of Müllerchen’s closest friends and acts as his guide by flying upwards and looking at the world ahead.