I really like the designs for these Matoran (especially the markings on 3), but I do have a criticism regarding the color scheme. One of the blues you’ve used looks too dark for Ihuans and looks too similar to Nahoan colors. Maybe various shades of grey would be better, to help distinguish who is what?
That being said, the first could be Toudo (acting as a trap-setter), the second could be Kylma (an experienced recruit), and the third could be Mazeka (who becomes a hero).
P.S.: @Gresh113: Could you edit Reysa to also be Onua’s wife (according to @DarkMaestro’s Bereavement)?