Being Human: First Arm concepts

With the use of Plutchik's wheel of emotions, i have used the links of the colours to the emotion I am trying to materialise. For example Sadness is blue, Anger red and Fear is green.
These are my first concepts on what the arms could look like. I will narrow down the designs to one per emotion, to then farer its design, like I've done for anger already. There is a bigger concept drawing of anger which i did before my digital concept which shall be on the bottom of this post.
My next step is to draw up the digital versions.