So these are kalikos favourite forms that he takes when he uses his holo-cloak. Invisiblility is not a form but a function that bends light to make the subject invisible.
He very much likes his arachnarekos form, as the species is known to be solitary in lifestyle, and although he cannot spin real arachnarekos silk, he can still climb walls and ceilings, as you may be able to tell, he has scanned both mei and skid and used their bodies as references for his own form, it he takes a strong likingness to them in appearance.
His goat/ram form is his absolute favourite to use. He hasnt used an existing creature as a reference, hes made the whole thing by himself from scratch and it fits him perfectly, like he hasnt even got his cloak active. He has also noticed that it makes people more receptive to him, perhaps as kaliko looks like a living creature rather than a complete assembly of parts... who knows...
Kaliko can take the form of any creature within the facility's data banks, along with any he has scanned. He can also make modifications to an existing creature or make a completely new creature from his imagination and transfer it to his cloaking device.
I hope you like them these where really fun to do, I may do more!