Lenka and Yuichiro are both very steadfast in their goals. They live for one reason and one alone. However, Yuichiro has really gone far in his quest to go from being a super annoying character to one that has finally realized what he should really be doing. At this point Lenka would not be able to keep up with his speed or drive at all. Not even his final mode would be a match here. Yuichiro wins.