Engineering Department[]
Shiraishi Utaha[]
Due to Kotori's tendency to explain everything in great detail, it's difficult for her to keep secrets. Some of those secrets come from Utaha. This causes Utaha to have to keep Kotori's mouth shut.
Nekozuka Hibiki[]
Although Hibiki often begins daydreaming whenever Kotori begins explaining, the two share the same passion for engineering and adding unnecessary functions into their work.
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| V • T • E Relationship (Playable Students) | |
|---|---|
 Abydos Icon
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Shiroko • Shiroko (Riding) • Shiroko (Swimsuit) • Shiroko Terror • Serika • Serika (New Year) • Serika (Swimsuit) • Hoshino • Hoshino (Swimsuit) • Hoshino (Armed) • Nonomi • Nonomi (Swimsuit) • Ayane • Ayane (Swimsuit) |
 Gehenna Icon
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Makoto • Iroha • Ibuki • Satsuki • Chiaki • Hina • Hina (Swimsuit) • Hina (Dress) • Ako • Ako (Dress) • Iori • Iori (Swimsuit) • Chinatsu • Chinatsu (Hot Spring) • Aru • Aru (New Year) • Aru (Dress) • Mutsuki • Mutsuki (New Year) • Kayoko • Kayoko (New Year) • Kayoko (Dress) • Haruka • Haruka (New Year) • Haruna • Haruna (New Year) • Haruna (Gym) • Junko • Junko (New Year) • Izumi • Izumi (Swimsuit) • Izumi (New Year) • Akari • Akari (New Year) • Fuuka • Fuuka (New Year) • Juri • Juri (Part Timer) • Sena • Sena (Casual) • Kasumi • Megu • Kirara |
 Millennium Icon
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Rio • Yuuka • Yuuka (Gym) • Yuuka (Pajamas) • Noa • Noa (Pajamas) • Koyuki • Chihiro • Maki • Maki (Camp) • Hare • Hare (Camp) • Kotama • Kotama (Camp) • Neru • Neru (Bunny Girl) • Neru (Schoolgirl) • Asuna • Asuna (Bunny Girl) • Asuna (Schoolgirl) • Karin • Karin (Bunny Girl) • Karin (Schoolgirl) • Akane • Akane (Bunny Girl) • Toki • Toki (Bunny Girl) • Utaha • Utaha (Cheerleader) • Hibiki • Hibiki (Cheerleader) • Kotori • Kotori (Cheerleader) • Sumire • Sumire (Part Timer) • Rei • Himari • Eimi • Eimi (Swimsuit) • Yuzu • Yuzu (Maid) • Midori • Midori (Maid) • Momoi • Momoi (Maid) • Alice • Alice (Maid) |
 Trinity Icon
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Nagisa • Nagisa (Swimsuit) • Seia • Seia (Swimsuit) • Mika • Mika (Swimsuit) • Kazusa • Kazusa (Band) • Natsu • Natsu (Band) • Airi • Airi (Band) • Yoshimi • Yoshimi (Band) • Tsurugi • Tsurugi (Swimsuit) • Hasumi • Hasumi (Gym) • Hasumi (Swimsuit) • Mashiro • Mashiro (Swimsuit) • Ichika • Ichika (Swimsuit) • Mine • Mine (Idol) • Hanae • Hanae (Christmas) • Serina • Serina (Christmas) • Hifumi • Hifumi (Swimsuit) • Azusa • Azusa (Swimsuit) • Koharu • Koharu (Swimsuit) • Hanako • Hanako (Swimsuit) • Reisa • Reisa (Magical) • Suzumi • Suzumi (Magical) • Ui • Ui (Swimsuit) • Shimiko • Sakurako • Sakurako (Idol) • Mari • Mari (Gym) • Mari (Idol) • Hinata • Hinata (Swimsuit) • Rabu |
 Hyakkiyako Icon
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Niya • Kaho • Chise • Chise (Swimsuit) • Nagusa • Renge • Renge (Swimsuit) • Kikyou • Kikyou (Swimsuit) • Yukari • Yukari (Swimsuit) • Shizuko • Shizuko (Swimsuit) • Pina • Pina (Guide) • Umika • Tsubaki • Tsubaki (Guide) • Mimori • Mimori (Swimsuit) • Kaede • Michiru • Michiru (Dress) • Izuna • Izuna (Swimsuit) • Tsukuyo • Tsukuyo (Dress) • Wakamo • Wakamo (Swimsuit) |
 Shanhaijing Icon
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Kisaki • Mina • Shun • Shun (Young) • Kokona • Saya • Saya (Casual) • Rumi • Reijo |
 Red Winter Icon
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Cherino • Cherino (Hot Spring) • Tomoe • Tomoe (Qipao) • Marina • Marina (Qipao) • Minori • Meru • Momiji • Nodoka • Nodoka (Hot Spring) • Shigure • Shigure (Hot Spring) • Yakumo • Takane |
 Valkyrie Icon
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Kanna • Kanna (Swimsuit) • Kirino • Kirino (Swimsuit) • Fubuki • Fubuki (Swimsuit) |
 SRT Icon
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Miyako • Miyako (Swimsuit) • Saki • Saki (Swimsuit) • Moe • Moe (Swimsuit) • Miyu • Miyu (Swimsuit) |
 Arius Icon
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Saori • Saori (Swimsuit) • Saori (Dress) • Atsuko • Atsuko (Swimsuit) • Misaki • Misaki (Swimsuit) • Hiyori • Hiyori (Swimsuit) • Subaru |
 Highlander Icon
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Hikari • Nozomi • Aoba |
 Wildhunt Icon
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Eri • Kanoe • Miyo • Ritsu • Fuyu |
 Schale Icon 3Category:test
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Miku • Misaka Mikoto • Shokuhou Misaki • Saten Ruiko |