Wait, what? It's Yukari...why doesn't she just gap it there?

Clearly because it's Yukari's master plan to indirectly have Ran and Chen take a peek and read the Kinnikuman books.

SuperKawaiiNeko said:
Wait, what? It's Yukari...why doesn't she just gap it there?

Gap harassment probably isn't the best way to get people to do what you want. Sending her Shikigami would be seen as being respectful.