The Sketchy Sketchbook of ....Sketchyness!!

[EduardoGaray]

better now dude, proportions seem alright to me. Now the only thing preventing the BB dude from looking all natural is the clothing. Just take a look at how those badass long coats wrap around the body in photos and movies, like westerns :D

And Rin... right in the kokoro dude. Now i want to make anoter Rin fanart myself.

About anime hair, take this with a grain of salt since i'm not particularly great at hair but, from what i've observed. Most artists do the anime hair like if they were sculpting pvc or resine figurines, and then add "texture" to the structure, like this guy does for example:

http://www.pixiv.net/member.php?id=388730

Just block in the general shape of the hair, like you were sculpting then add the texture to make it look like hair and not some plastic structure over her head.
Cheers mate!