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(CR26) [White Elephant (Various)] Futomomo Shukujo Kannoushashinshuu (AIKa)

(C54) [JUMBOMAX (Ishihara Yasushi)] AIka Dynamic (Agent Aika)

(C54) [BLACK STARS (Miura Takehiro)] GUNYOU MIKAN Vol.12 (AIKa)

[Mudai Document (Kari (Marron)] Agent Alone ~Kodoku na Agent~ (Agent Aika)

Aika Complete Fanbook

(C52) [Nakayohi Mogudan (Mogudan)] Sakura Gumi (Sakura Wars, AIKa)

(C52) [Nakayohi (Mogudan)] Sakura Gumi (Sakura Taisen, Agent AIKa)

(SC36) [Yomosue Doukoukai (Gesho Ichirou)] OUT TRIAL 2 (AIKa) [English] [N04h]

(SC36) [Yomosue Doukoukai (Gesho Ichirou)] OUT TRIAL 2 (AIKa)

[Sangetsu No Lion (Don Shigeru)] DENGEKI 2 (Agent Aika) (Digital)