Bens shiik and Kaai concepts

The enemy called the shiik this is my concept, as you can see it's taken more of its design from a manta ray with features from a bat 

My concepts of both the kaais, as you can see the evil kaais has more spikes and has a more meaner look to its design


All of these concepts need to go into photoshop to add colour to them but was thinking a grey and navy colour scheme for the shiik and for the kaais the cute one would have a light blue and green colour scheme while the evil one would have a red and yellow colour scheme to empathise that this is the bad guy and mean