Talk:Episode 11 - Makeup/@comment-24611904-20140802151832/@comment-24611904-20140802152808

I'd like to quote Godzillafan93's theory on this I found elsewhere:

"When Kouichi, Mei, and Izumi found Maejima in the hall, they heard Takako scream (which is in and of itself shocking, since the only time she lost her cool was when Junta died, so she must've been really terrified). When they go up to her room, they find it stained with blood and no Takako. When she shows up later, she's bloody too, but has no visible wounds (aside from her hand being wrapped up; I always assume she'd grabbed Keiko's knife by the blade to protect herself). Takako deliberately avoided killing people other than Mei, so it's not too likely the blood is another student's.

While its somewhat assumption based, this is what I assume happened: Keiko showed up, covered in Maejima's blood, at Takako's door. Takako screamed, the two fought, and Takako suffered defensive wounds before managing to escape (I guess she got a few good licks in too, since she's got blood splatters on her too). She either got help from another student or bandaged herself up, grabbed that giant needle thing, and decided to go Mei hunting. I guess it's possible she and Maejima were together (not likely, but possible; maybe something for your story?), and that's where the blood came from, although as nutty as she is, I don't think she'd have left him alone and injured. "

(source = http://another.wikia.com/wiki/Keiko_Numata)

We see the psycho innkeeper with such a giant needle later on as well. Since the one Takako is holding already has blood on it, I think she took it from her in the struggle.