An anime made by Tatsunoko, the masters of anime in
japan.
The plot revolves around a bishonen, Otoha, former yakuza member, who earns the power to become a Karas, a superpowered ninja covered by a black armor. This armor gives him powers to protect the city against the mikuras,
machine demons created by the former
Tokyo's protector, Ekou, a Karas who turned against the city.
Also, there's the Yurines, fairies who travel together with the Karas, giving them their powers.
It is a unique anime with 3D-celshaded scenes blending with traditional animation, splendid fight scenes - they actually fight, instead of shitty, pointless drama and
angst, like in naruto and twilight
books.
Karas is also a
top-tier character in Wii's crossover fighter Tatsunoko vs. Capcom and has a fighting style similar to Strider Hiryu, focusing on speed and chain combos instead of damage.