At least a third, and possibly more, of these matches had no personal favorites of mine in them. Then Kotomi Ichinose and Nanoha Takamachi just have to be in the same arena together...
gah! 
That was painful. Other than that, not too much difficulty here.
ARENA 01: Astarotte Ygvar
[Kanzaki H. Aria] Taneshima Poplar
ARENA 02: Ayuzawa Misaki Kunieda Aoi
[Shionji Yūko (Alice)]
ARENA 03: Elucia de Lute Irma
[Inui Sana] Kasugano Sora
ARENA 04: Chii Hiiragi Tsukasa
[Kotobuki Tsumugi]
ARENA 05:
[Evangeline A.K. McDowell] Louise Vallière Lucy Heartfilia
ARENA 06: Ibuki Fūko Nymph
[Suigintō]
ARENA 07: Honma Meiko Shimada Minami
[Yune]
ARENA 08:
[Makise Kurisu] Nanasaki Ai Yamada Aoi
ARENA 09:
[Mine Riko] Oikawa Tsurara Yarizui Sen
ARENA 10:
[Abstained] Alice Kotegawa Yui Shirai Kuroko
ARENA 11:
[Furukawa Nagisa] Hinamori Amu Kawashima Ami
ARENA 12:
[Kōzuki Kallen] Oshino Shinobu Saginomiya Isumi
ARENA 13: Aragaki Ayase Laura Bodewig
[Uryū Minene]
ARENA 14: Dalian Mikazuki Yozora
[Tsurugi Minko]
ARENA 15: Inami Mahiru Kirishima Shōko
[Minato Tomoka]
ARENA 16: Erza Scarlet Index L. Prohibitorum
[Sōryū Asuka Langley]
ARENA 17: Haibara Ai
[Sakagami Tomoyo] Yin
ARENA 18:
[Kamio Misuzu] Sanzen'in Nagi Yūki Mikan
ARENA 19:
[Ayase Chihaya] Himeji Mizuki Ika-Musume
ARENA 20: Hakamada Hinata
[Haruna] Shinonome Hakase
ARENA 21:
[Sakura Kyōko] Takahara Ayumi Tsugumi
ARENA 22: Ayanami Rei
[C.C.] Tsukimiya Ayu
ARENA 23: Chrome Dokuro Ichinose Kotomi
[Takamachi Nanoha]
ARENA 24: Hoshina Utau Izumi Konata
[Tainaka Ritsu]