In the spirit of being an over-the-top nitpicker, I don't think Shananka is a Japanese name. Also, it's spelled "ninjutsu". And I assume he dyes his hair?
Er... anyway... Another cool card. I like the yakuza background and the heel-face turn. I like the muteness too -- comics doesn't have enough disabled characters. He reminds me a lot of former Batgirl Cassandra Cain, who was a very similar background and disability. (Though of course, this fella's older.)