Ugh, nearly missed out.
SPOILER
ARENA 01: [Yui] Gasai Yuno
ARENA 02: Kashiwazaki Sena [Shimada Minami]
ARENA 03: Mine Riko [Abstained] Eucliwood Hellscythe
ARENA 04: Fear Kubrick [Abstained] Akemi Homura
ARENA 05: Hasegawa Kobato [Mikazuki Yozora]
ARENA 06: Kōsaka Kirino [Abstained] Honma Meiko
ARENA 07: Charlotte Dunois [Abstained] Nakagawa Kanon
ARENA 08: [Kuroi Mato] Suzutsuki Kanade
ARENA 09: Aragaki Ayase [Yuzuriha Inori]
ARENA 10: Tōwa Erio [Abstained] Elucia de Lute Ima
ARENA 11: Gokō Ruri (Kuroneko) [Abstained] Haruna
ARENA 12: [Nakamura Yuri] Haqua du Lot Herminium
ARENA 13: Sakura Kyōko [Tachibana Kanade]
ARENA 14: Victorique de Blois [Abstained] Kasugano Sora
ARENA 15: [Kirishima Shōko] Himeji Mizuki
ARENA 16: Konoe Subaru [Abstained] Kanzaki H. Aria
ARENA 17: [Iwasawa Masami] Makise Kurisu
ARENA 18: Shiomiya Shiori [Irisviel von Einzbern]
ARENA 19: Araragi Karen, Araragi Tsukihi [Hirasawa Yui, Hirasawa Ui]
ARENA 20: [Suzumiya Haruhi] Shirai Kuroko
ARENA 21: Senjōgahara Hitagi [Abstained] Shiina Mafuyu
ARENA 22: Nymph [Nakano Azusa]
ARENA 23: Index L. Prohibitorum [Aisaka Taiga]
ARENA 24: Nagato Yuki [Sakagami Tomoyo]
ARENA 25: Sengoku Nadeko [Ichinose Kotomi]
ARENA 26: [Akiyama Mio] Hirasawa Ui
ARENA 27: Katsura Hinagiku [Kotobuki Tsumugi]
ARENA 28: [Furukawa Nagisa] Oshino Shinobu
ARENA 29: [Louise Vallière] Izumi Konata
ARENA 30: [Misaka Mikoto] Konjiki no Yami
ARENA 31: [Tōsaka Rin] Fujibayashi Kyō
ARENA 32: Asahina Mikuru [Shana]
ARENA 33: [Saber] Hecate
ARENA 34: [C.C.] Holo
ARENA 35: Sanzen'in Nagi [Hirasawa Yui]
ARENA 36: Hiiragi Kagami [Illyasviel von Einzbern]
ARENA 37: [Ikaros] Last Order
ARENA 38: Orimura Ichika, Laura Bodewig [Abstained] Kōsaka Kyōsuke, Aragaki Ayase
ARENA 02: Kashiwazaki Sena [Shimada Minami]
ARENA 03: Mine Riko [Abstained] Eucliwood Hellscythe
ARENA 04: Fear Kubrick [Abstained] Akemi Homura
ARENA 05: Hasegawa Kobato [Mikazuki Yozora]
ARENA 06: Kōsaka Kirino [Abstained] Honma Meiko
ARENA 07: Charlotte Dunois [Abstained] Nakagawa Kanon
ARENA 08: [Kuroi Mato] Suzutsuki Kanade
ARENA 09: Aragaki Ayase [Yuzuriha Inori]
ARENA 10: Tōwa Erio [Abstained] Elucia de Lute Ima
ARENA 11: Gokō Ruri (Kuroneko) [Abstained] Haruna
ARENA 12: [Nakamura Yuri] Haqua du Lot Herminium
ARENA 13: Sakura Kyōko [Tachibana Kanade]
ARENA 14: Victorique de Blois [Abstained] Kasugano Sora
ARENA 15: [Kirishima Shōko] Himeji Mizuki
ARENA 16: Konoe Subaru [Abstained] Kanzaki H. Aria
ARENA 17: [Iwasawa Masami] Makise Kurisu
ARENA 18: Shiomiya Shiori [Irisviel von Einzbern]
ARENA 19: Araragi Karen, Araragi Tsukihi [Hirasawa Yui, Hirasawa Ui]
ARENA 20: [Suzumiya Haruhi] Shirai Kuroko
ARENA 21: Senjōgahara Hitagi [Abstained] Shiina Mafuyu
ARENA 22: Nymph [Nakano Azusa]
ARENA 23: Index L. Prohibitorum [Aisaka Taiga]
ARENA 24: Nagato Yuki [Sakagami Tomoyo]
ARENA 25: Sengoku Nadeko [Ichinose Kotomi]
ARENA 26: [Akiyama Mio] Hirasawa Ui
ARENA 27: Katsura Hinagiku [Kotobuki Tsumugi]
ARENA 28: [Furukawa Nagisa] Oshino Shinobu
ARENA 29: [Louise Vallière] Izumi Konata
ARENA 30: [Misaka Mikoto] Konjiki no Yami
ARENA 31: [Tōsaka Rin] Fujibayashi Kyō
ARENA 32: Asahina Mikuru [Shana]
ARENA 33: [Saber] Hecate
ARENA 34: [C.C.] Holo
ARENA 35: Sanzen'in Nagi [Hirasawa Yui]
ARENA 36: Hiiragi Kagami [Illyasviel von Einzbern]
ARENA 37: [Ikaros] Last Order
ARENA 38: Orimura Ichika, Laura Bodewig [Abstained] Kōsaka Kyōsuke, Aragaki Ayase