[quote=@The Grey Dust]
<Snipped quote by Xeiyenreisha>

And he will ignore Shinrei, because frankly my dear, he's not worth his time, just like everyone else he'll duel, practically defeat, and then at the last moment, decide to surrender the duel and turn around saying something about meaningless victories.
[/quote]

Actually he will be very beneficial toward Tsukiko's character developing and changing over time. I'm not going to say how since that would be obvious spoilers but it does leave me with an idea. I will wait and see how the story develops.

But seeing him might influence Shinrei. Well, seeing him duel someone that is.