those girls are so lively

TL notes from Ralen:
p2: I don't know if these are supposed to be specific characters, or just general stereotypes. Miu seems to be dressed like a bōsōzoku, a member of a Japanese bike gang. Her banner says "Kenka Joto" which is literally "Superior at fighting" but roughly more like "Come at me." It looks like Chika's armband says 風記, but I think it's supposed to be 風紀, which is something like "moral order," but you can just think of it as "Hall Monitor."
p5: In case it's not clear, these phrases are all anagrams. I felt like trying to do the same thing in English would have been too much effort, so I just translated them directly.