It was a wee bit tricky designing her outfit. You want the colours and design of the scene to in some way reflect the mood of the illustration, or, at least, not clash wildly with it. This will, of course, include the clothes worn by the characters
Fine - except if the same outfit has to be used in two consecutive pictures, one showing her dead (which would be best complemented with dull-ish colours, and a cool palette) and one showing her alive (as vibrant as possible)!
Here was my solution:
The purple top works fine with the sad picture. However, when you combine it with the orange skirt, it's certainly bright - not to say garish! (But I think a 12-year-old can get away with it.)
I also gave her straightish hair because it could either lie limply or swirl about a bit.
I got her outfit from the wall-paintings in the synagogue at Duro Europos in Syria. (They're a slightly later period, but some clothes are certainly the same as 1st century, and it's better than nothing.)