To distinguish their year level, they have star badges on their school uniforms, sometimes around the collar. The number of stars denote what level they are in.
- Third Year
- Second Year
- Tsurishi (Suda Akari SKE48)
- Zakoboss (Matsumura Kaori SKE48)
- KY (Tani Marika SKE48)[note 1]
- Shirogiku (Shiroma Miru NMB48)
- Kurobara (Yagura Fuuko NMB48/AKB48)
- First Year
- Demekin (Jonishi Kei NMB48)
- Bukkomi (Kondo Rina NMB48)
- Diva (Furuhata Nao NMB48/AKB48)
- 170 (Tanaka Natsumi HKT48/SKE48)
- Siberia (Murashige Anna HKT48/NMB48)
- Kimotama - (Yabushita Shu NMB48)
- Ibukuro - (Kadowaki Kanako NMB48)
- Ijirii - (Ijiri Anna NMB48)
- Other Students
- Jo (Jo Eriko NMB48)
- Tekitou (Murase Sae NMB48)
- Otenki (Fuchigami Mai HKT48)
- Hamster (Kumazawa Serina HKT48)
- Handsome (Tanigawa Airi NMB48)
- Michelle (Michelle Christo Kusnadi JKT48)
- Gekioko served as the main rival of Majisuka Jyogakuen, and was shown that they had defeated Majijo's previous rival, Yabakune Joshishogo Koko. After Sakura defeats Antonio, one of Yabakune's leader candidate, Gekkou, declared her intention to fight Majijo, making Yabakune their rival once more.
- The Kango-ka act as the school's version of Majijo's Rappapa.
- All students in Gekioko were primarily portrayed by SKE48, NMB48, HKT48 and JKT48 members.
- Michelle is the only yankee in the series who is explicitly not Japanese, being a foreign exchange student from Jakarta.
- KY has only one star, but is listed as a 2nd Year student in the official website.
|Kango-ka||Antonio | Coby|
Tsurishi | KY | Zakoboss
Demekin | Red