Gwel

Appearance
Gwel is made of 8 red blocks, with 1 maroon colored 8 pointed star, 1 lavender colored 7 pointed star, 1 static colored 6 pointed star, 1 olive colored 5 pointed star, 1 grey colored 4 pointed star, 1 yellow colored 3 pointed star, 1 blue colored 2 pointed star, 1 red colored 1 pointed star, and has a red face, and red limbs.

Gem Logic
It's known that gwel's gems appear after making a clone of himself to split into Swen and Uno in the episode he debuts in, also gwel's gems don't appear when he is compound.