Possibly a case of an unstoppable force encountering an immovable object?
Great work PD, the character of the sleeve nice old-skool touch too. Seeing the ninja jumping on the front instantly spawned in my imagination another scaling the back of the tee with hand claws.
It's great that you included the concept sketches too, not only shows that it's original work, but reveals the steps in the design process, plus we can check out the construction lines/blocking out used when you draw, which is always pretty cool.
Another ninja scaling on the back of the tee with hand claws is a great concept. If you're ever interested, I could make that for you ;)
Yes, an unstoppable force in the ninja is wise to take the fight in the blackness of night where the samurai is at his mercy. As much as I love samurais, the cunning and mystical ninja is superior, but if it's a ronin, the fight evens out.