The other two images from the assignment. I'm much happier with these two than I was with the first characters. First lady is an "unlikely villain" and the second is a female hero that is supposed to have what Ryan Woodward calls "sex appeal." Personally, I don't like the term because it encourages students to focus on the wrong aspects of what makes a female character attractive. I just like to say that she's pretty.
EDIT: Just to clarify, I'm not saying that Ryan is encouraging the wrong approach to making tasteful female character designs---I'm saying I don't like the term "sex appeal" because taken by itself, could give the wrong impression. Hope I didn't give anyone the wrong impression with that---if so, I'm sorry.
Any critiques are welcome!