Chroniko

A girl Kaiba meets during a stop Neuron makes in episode 3.

She sells her body (literally) so that the money can support her family and hopes that someday her family will become wealthy enough to buy her a new body in the future; however, she is killed by a corrupt doctor (by simply releasing her mind from storage), and her body is sold anyway. Before her body is taken by the buyer, Hyo-Hyo places Kaiba's mind inside her body, and Kaiba uses this disguise to avoid capture and get back aboard Neuron.