Looking into trails for the inky female (2D)

Here are some research images to help myself and the other 2D animators get a feel and understanding as to the inky-ness i would like in the female character in the beginning. Looking into 'Fantasia 2000' (Firebird) aswell as 'Paranorman' and looking at the movements that Glen Kean brought across for the 'little Mermaid' What with her hair in water and how it moves around according to the body.