How fast are you trying to make this? If you're not trying to meet a short deadline, I'd suggest taking some time to clean up what you already have (EVA foam can sand or file so it'll only take a few minutes to crisp up those bevels) and research your build techniques- like
m00sem4n (congrats on 50 posts, btw) implies, there are considerations to multimedia builds- as well as the individual tips and tricks available for each.
For example, it looks like you're sawing the EVA, rather than cutting cleanly through it in single strokes with a vertical blade. On the Pep, your bevel around the inside of the top of the shoulder is uneven and your hot glue is visible. For a quick Halloween build, that's ok, but if you're trying to put something together to keep, it's worth slowing down.
As with all things in Makerdom, patience is ultimately rewarded.
If you're just getting ready for a fancy dress party, feel free to ignore all this; looking good!