For a long time, I've done CAD drawing for my job, but I've done very little artistic drawing. Here are a couple of pencil drawings that I did about ~20 years ago. I'm not sure if the originals still exist. Sorry for the B/W, color drawing is beyond what I can do ^_^;;
Eagle Vision:
(https://www.henheart.com/rayearth/images/eagle1a.jpg)
Umi Ryuuzaki:
(https://www.henheart.com/rayearth/images/umi6.jpg)