Adam, known as Koki Kuzuyama in the Japanese version is a character from Yu-Gi-Oh! 5D's.
Adam had a strong relationship with his father, Bashford, who would often Duel him. As a result, Bashford built a Duel Arena for the same purpose.
However, because Bashford became caught up within his job, he neglected Adam and his mother, prompting a separation. Adam was taken by his mother. Before Adam was taken, his father gave him "Kid Junk". Bashford kept the Duel Arena functioning in hopes that Adam would come home. Bashford hasn't seen them since.