As a pla
In D&D 3.5e ed. the ninja I play is a Bahamut faithfull elf who has been transformed into a dragonborn, 13th level ninja, 5th level shadowdancer, 10 levels (of powers only) of Hand of the winged master. At level 19th he will take a level of shadowblade. He is a master spy and bodyguard. Without armor (AC34), he is better protected then those who have armor.
In DC Heroes, my character is a ninja without martial art skill but simulating everything differently by some powers: projectile weapons power for shurikens, Molecular chameleon to disperse into a gas form or to become as translucide and hard as diamond, has learn some skills of thief and acrobatics and some occult knowledge. He is to be the leader of the group.