|First Appearance||The Water Kingdom's Beethoven|
Beethoven is a highly talented pianist who feels trapped on planet 4D-3 and wishes to travel throughout the galaxy sharing his talent with the universe.
During a layover on 4D-3, Maetel and Tetsuro decide to stay at an inn ran by an elderly woman who lives with her son, a talented pianist. While bathing, the son attacks Maetel in order to get her boarding pass but he is quickly defeated by her. His mother begs Maetel for forgiveness and says that her son acts out like this because he wants to travel the galaxy as a pianists but it is nigh impossible for him to earn enough money for a boarding pass while on such an underdeveloped planet. Maetel and Tetsuro forgive him, but they refuse to give him their boarding passes or sneak him onto the ship. After they leave, the young man is inspired to earn his pass the legitimate way.