Adler is a large bird with red feathers, and white feathers around his head and neck. He has a yellow beak and feet.
Adler gives the following puzzles in Professor Layton and the Azran Legacy:
"Adler is a large bird who is in love with the sleeping phoenix of Mosinnia. Despite being a friendly and cheerful creature, Adler's imposing physique means that he is widely feared in the forest. He has no idea that the gold statue in the town square is actually modelled on one of his ancestors."