Haseo is in his X Form and has the full power of his fellow epitaph users. (His game incarnation, not the manga ones or his trilogy form)
Yuki is allowed her standard abilities, minus freezing Haseo 's data.
Fight takes place in "The World" who wins?
Hopefully I just didn't create a massive stomp for either character, if it is feel free to correct me and provide how it could be less of a curbstomp. :P