Actually that's her little pinky finger, her thumb is hidden underneath the red skirt. But thanks for your comment, really appreciate it :)
Roll by @bleedman (bleed man)
My favorite little robogirl Roll, she's not as popular as megaman or zero but she's just adorably cute...
She is absolutely ADORABLE! I really love your cute style for rendering young girl characters like her, with the large feet and round faces. All the different poses make her just look absolutely adorable here. I can honestly see but one anatomy issue. In the left corner where she is standing, it appears that her right (not ours, hers) thumb is on the wrong side of her hand. That's all.
As for the composition, it's very cute and creative, but a tad crowded. This could completely be eliminated, I feel, by adding more 'dividers' between the different images--fading some of the background images is a great touch, but adding white outlines around all of the 'closer' images (like you did for the main one) would help to lead the eye much better. As it is it seems just a tad too crowded. But goodness, all those poses... they're so CUTE!