I love this. The Hakurei Miko: The only person strong enough to physically beat Yuuka. And Yuuka approves of that. A strong, honorable opponent is almost a friend, as they say. Here, it has moved beyond friendship.
Not the way I see it. Yukari is known more for trickery and guile than raw strength, while Yuuka is considered a big shot not for conspiracy, but for her pure power, so doing this is a testament to how they interact. Besides, I don't see Yukari doing this. other than her ties to the border, I don't see her and the hakureis getting along, especially this one. Yuuka, on the other hand, might admire such power from someone other than herself. Granted, this is all speculation, but that's how I see it.
