https://brickset.com/minifigs/category-Ninja/year-1998

CAS048: Ninja - Black x 3

CAS049: Ninja - Gray x 1 

CAS052: Ninja - Robber, Brown (Missing Black Minifigure, Headgear Hat, Cloth Wrap / Bandana with Single Tail in Back) x 3

CAS053: Ninja - Robber, Green (Missing Black Minifigure, Headgear Helmet Ninja / Samurai with Clip and Short Visor) x 3

CAS055: Ninja - Samurai, Blue Young x 1

CAS056: Ninja - Shogun, Blue with Armor x 2

https://brickset.com/minifigs/category-Ninja/year-1999

CAS050: Ninja - Red x 4

CAS057: Ninja - Shogun, White with Armor x 2

CAS058: Ninja - Princess, White x 1

All listed figures should be complete unless otherwise noted but please thoroughly review pictures as mistakes may have been made. Figures were checked with bricklink to verify parts.