Here are some Grel sprites, mocked-up by my brother for use in the game. The Grel have undergone somewhat of a design change, with smaller eyes and a bit of an esca bobbing on their heads.
Here are the same sprites, but wearing construction helmets. Grel are builders and explorers by nature, so protective headgear is a must at times. Plus, it makes them look pretty dang cute.
As a sidenote, I would like to apologize for the lack of progress on the game lately. I got majorly distracted by Mother 3, and was also in the midst of a pretty involved music licensing contract project. I have completed both things now, so updates should come more frequently.