The homework was for a seasonal Sue. The rainy season is on in Japan and that is why Sue is hiding her face underneath an umbrella - Sunbonnet Sue ought to be called Umbrella Sue.
Whipped Running Stitch was used for the outlines.
Upright Cross Stitch works well as a filling stitch, both on the teaser (the Wellington boots) and on the hand, where I staggered the stitches.
The Y Stitch with its loop made good raindrops, I think.
The Vault Stitch was a challenge to do on the plain weave.