The most interesting fight for me so far is Siegfried vs. Hermit. I expected Sieg to lose but him being very close to Hermit is an amazing feat considering that Sieg was not trained under a supermaster. In addition, we now know that Ken is better than Hermit. Being the only one who are able to hit Kensei (with Ryuuto help), Ken seems to be the best fighter in both Yomi and the Alliance.
I thought it was pretty funny when Sieg was speaking about the power of friendship/companions even though he lost, glad to see most of the fights have been cleared.