I've always wondered why there are such inconsistencies in the ribbon colors on the whole HS period during the show.
- In the first half of season 1 HTT members are freshmen in HS with a blue ribbon
- In the second half of season 1 Azusa enters HS and as a freshman with a red ribbon instead of a blue ribbon. HTT original members keep the blue ribbon despite being in 2nd year
- In S01E12 there seems to be a senior in the audience of the 2nd performance of HTT with a green ribbon
- In the ep. where they remember Megumi Sokabe she's shown using a green ribbon (she was a senior)
- In S02 they show two girls who're part of Mio's fan club who are freshmen, and they're wearing green ribbons
- HTT girls keep on wearing blue ribbons despite being in the last year of HS
In summary, my theory is that depending on which exact year they entered high school girls are assigned a different color ribbon, i.e:
- Girls who entered HS in 2008 are assigned a green ribbon (Megumi, senior in the previous picture at 2nd HTT performance)
- Girls who entered HS in 2009 are assigned a blue ribbon (HTT original cast)
- Girls who entered HS in 2010 are assigned a red ribbon (Azusa, Ui, Jun)
- Girls who entered HS in 2011 are assigned a green ribbon (the 2 girls that are part of Mio's fanclub)
- and so on...
IDK, what do you think about this? Is there any other plausible explanation?