@tbrk, @deivcalviz, @sanguine, @rgdraw, @meonika, @thomasputman, @racnos Thank you everybody for you helpfull comments, I took them all, made a mashup and come up with another batch of sketches.
@rgdraw, your comment almost killed me ^^, i had a hard time figuring out how to keep the "luring" aspect. Well, it's still not on point.
I guess i'll work more on the flow with the z axis and the definition of the shapes of the main character whilst drawing the main illustration.
See you soon with some colours.