So, I guess that everything that Yuuko touches becomes invisible, otherwise Momoe should have freaked out seeing the floating chopsticks, right?
I have to say that I am in the minority here who dislikes Yuuko. She is extremely possessive of Teiichi, to the point of slapping Kirie and pulling pranks on poor Momoe (writing on her forehead, throwing away her chopsticks, etc.) who can't even see her.
She is also very clingy and doesn't respect Teiichi's personal space at all. In this episode alone we see her pestering Teiichi to say that he loves her at the school gate, then again in class during a test. Doesn't she realize that to normal people he would look like a fool who talks to himself?
Well, I just hope that this show won't pull a deus-ex-machina ending where Yuuko is magically resurrected.