Tattoo design brother and sister

Someone asked me to make detailed wolf faces with a touch of the mexican skull design.
It was for a brother and a sister. The left is the female one and the right the male.. 

The female had to look sweet and I gave it more rounding figures, while the male one looked very tough and has more pointy figures.
My inspiration was Iain Macarthur. I am so fond of his drawings and really love how he's making details with the fineliners.

These are only sketches. I had no time to finish it with fineliners.