Hear me out ! The song the moon will sing by the crane wives is perfect for the relationship Gyro has with his father. He looked up to him like the sun and followed the path he drew for him. But in the end, it's killing him to follow the executionners' path, he can't find himself anymore in it and can't match his father's expectations. He can't shine by himself before the race, and even during the race he's fighting with his father's technique, so whatever he accomplishes he owes it to where he comes from... He's ambivalent in his feelings, he deeply wants to rebel against his job but still is so attached to his family's expectations and honor, and proud of his role, that he woundn't even think about quitting or rebelling in a more frontal way (because let's not forget his participation in the race is an obedient complaint, a fight against authority he's been allowed to have by this same authority. He would never have managed to freed himself, he's so endoctrinated he can't even imagine it as a possibility. His father was right in some way about the sensibility... To be a professional killer, you need to either shut down and desensitize yourself, or make of yourself a monster - someone who enjoys killing and dehumanizes completly the victims.)
Tell me once again
I could have been anyone, anyone else
Before you made the choice for me
The moon will sing a song for me
I loved you like the sun
Bore the shadows that you made with no light of my own
I shine only with the light you gave me (x2)
I could have been anyone, anyone...