(SC36) [Yomosue Doukoukai (Gesho Ichirou)] OUT TRIAL 2 (AIKa)
(C52) [Nakayohi (Mogudan)] Sakura Gumi (Sakura Taisen, Agent AIKa)
(C52) [Nakayohi Mogudan (Mogudan)] Sakura Gumi (Sakura Wars, AIKa)
(C54) [JUMBOMAX (Ishihara Yasushi)] AIka Dynamic (Agent Aika)
(CR26) [White Elephant (Various)] Futomomo Shukujo Kannoushashinshuu (AIKa)
[Sangetsu No Lion (Don Shigeru)] DENGEKI 2 (Agent Aika) (Digital)
Aika Complete Fanbook
(SC36) [Yomosue Doukoukai (Gesho Ichirou)] OUT TRIAL 2 (AIKa) [English] [N04h]
(C54) [BLACK STARS (Miura Takehiro)] GUNYOU MIKAN Vol.12 (AIKa)
[Mudai Document (Kari (Marron)] Agent Alone ~Kodoku na Agent~ (Agent Aika)
