I always try to avoid calling them ninjas, i try to refer as them as masked warriors, or masked assassins. Anyway, i see why people calls them like that, i mean, even the MKTeam does.

Ninja or not, Tanya is in the same group of Kitana, Millena, Jade and Skarllet. Even if she doesn't wear a mask.

Yup, including Khameleon. It's nice to see how they each have evolved into different looking characters. I think it's safe to say that Tanya would have gotten the same outfit as them if she had been created in MKII or MK3 only yellow probably with a boomerang as signature weapon.

I consider Tanya a ninja because of khameleon she has her move and she only takes a move from the female "ninjas" aka kitana, mileena, jade, and now Tanya
Ageed :]