It's hard to say 100% looking at your pictures, however as what I can tell, that both Coco and Casper are dilute sky, but if you look at them without crazy lightening and when they stay next to your pied babies if their body color look alike, then they could be FBC (full body color) greywings or even clearwings.
Defintely not Clearwing. Clearwings have full strength body colour so the Skyblue would be as strong as on a Normal. I think Greywings or dark Dilutes? The reason Miss COco has white flights, tail and a white patch on her tummy is that she is a Dominant Pied also.