About Robot: (Red are what we could possibly leave out) [Green what I surely would want to keep]
Its main purpose was to be a protector. Robot possesses a full humanoid stature, capable of walking with two legs. He can transform his two arms into four and he possesses powerful energy weapons, which are fired from the palms of his hands. His face is a translucent material filled with millions of multicolored lights. He is an amalgam of shapeshifting alien metal and organic thought patterns...
He possesses the ability to produce strong heat from his body, enough to melt ice.
He is also able to learn new things nearly instantly.
Robot also has immense strength - he can bend titanium with little effort, carry things almost as heavy, if not heavier, than himself, and he can deal with hostile animals with ease, either using his energy weaponry to shoot and 'melt' them, or just tear their jaws or bodies apart.
When angered or enraged, he transforms into a many-limbed form capable of withstanding most attacks and dealing out punishing damage.
Robot also grows to care, in his own way, wanting to help and protects his friends and family.
Despite many seeing him as a threat, which he evidently is, he doesn't attack anyone unless provoked.
He is both an advanced machine but like a child learning new things - just much faster than a child would.
While this all could be seen a little overpowered, until we have someone playing him, (or it) we could keep these as a known quality.