Annotation request on the above... I filled in most of them, though I have some questions on some. The ones with questions I made longer to distinguish them.

• Unknown #1: note #2849116
• Could be Sasaki Akebi, but she's already at note #2849109
• Unknown #2: note #2849117
• Could be Itsumi Erika, but her hair is not long enough, plus she might also be at Unknown #4
• Unknown #3: note #2849118
• Could be Nishizumi Maho, but she's already at note #2849077, though perhaps it's a younger version?
• Unknown #4: note #2849119
• Could be Itsumi Erika, but it conflicts with unknown #2, though perhaps it's a younger version?

Also, I wasn't able to find Kondou Taeko anywhere, even though she should as all the rest of the Ooarai team is represented.

Are the little pictures taken from the contents of the doujin? If so, it might be possible to confirm the characters by finding where the images appear within the book, if someone around here has it.

Unknown #3 is Kondou Taeko. You can notice her ribbon she wears on her head.
Maybe Unknown #1 is an OC. Unknown #2 is Itsumi Erika since she is the only one that does not have a hexagonal picture(aside from Saki Maruyama, who might be the one hexagon that was blocked by Azusa's arm). I'm also guessing Unknown #4 is a younger Erika because of the hat she is wearing is almost the same one she wore in one of the Motto Love Love 4koma.