Jittertwig is a Lab rat Raptor; An experimental specimen that eventually was used in the Splicing session, resulting of partially Belladonna's birth. He's used on a daily basis for vivisection- He has a metal plate in his ribcage to replace the cartilage and part of his tail is gone, replaced with a robotic metal tail bit. Oh he has a zipper that extends from his upper body to above his groin. He can be drawn in many ways, he can have a normal functionally tail, he can also be a feral.

Robotic Tail function- To induce beneficial medications or health-harming liquids into the tail, spreading up into his spinal area, crawling into his body system. There is a little chamber to pour them in.

Metal chest plate- To hold together his ribcage and can be easily taken apart for vivisection.

Zipper- For easy access to work on him with out re-slicing him open every time.

[EDIT- I'm slowly adding info atm, if any question please ask. :3]