Aporia's father is a character in Yu-Gi-Oh! 5D's.
He, his wife and Aporia were chased by a Meklord Emperor Granel, which fired a beam at them, killing him and and his wife.
Aporia survived the attack and regarded their death as his despair of losing people who loved him. His embodiment Lester is based on the despair he suffered at this part of his life.