Fai Aja and Say Aja are the third boss of Castle of Shikigami II. Fai is the oldest brother with blue armor, while Say is the youngest brother with red armor.
These two brothers are knights who sought immortality, finally obtaining it from the powers of the Castle of Shikigami. They are now bounded to the castle, eternally guarding it with their own lives.
The two brothers fight in tandem, sharing the same lifebar. While Fai sweeps the screen with small shots and lasers, Say shoots fireballs. When the two are almost defeated, they launch a kamikaze attack, attacking each other and releasing shots everywhere.