That's an easy one.....I have a list of stuff you can use to make the characters. (I tested this out on tektek, of course). Unfortunately, I've only got Aeris and Tifa right now.
sweatdrop Tifa (FF7): It helps if you have Sleek Brown Hair and red eyes for this one (at least that's what I used). Then you can wear a white crossed sports bra, a stylish auburn skirt, brown hiking shoes, and maroon get-a-grip gloves....voila!
Aeris (FF7): Aeris was slightly tougher. I've got two designs, although I think the first is more accurate. For the first one I used: brown Whip hair and green eyes, fancy virgin dress, brown work shoes, fancy pink ribbon, red ruffled top.


For the second, I used the same, only I used the Play hairstyle.