(This was a character I built to try and win a 2015 Bionicle G2 competition. An alien solder designed after the mechanics of Sidorack and the Bohrock swarm with geared systems for moving arm and a head that pops forward while exposing its teeth.)
A short synopsis...
Once upon a time, in the time before time, six Toa heroes were once again reunited in order to serve and protect the villagers of their island home, Okoto, and eventually find a way to awaken the Great spirit. As Important as both these tasks were, the Toa Heroes were having a hard time with the first task. An alien race known as the Etherack, look down upon the Island upon their mighty ships, ready to destroy anything in their path. These powerful species armored with the same material all of the Toa were armored with: Protodermis. The only weakness these villains had were their masks: small brain like faces underneath their skull that control their skeleton body. Retrieving these masks rendered their hostile form into a lifeless skeleton, a task essential for stopping them, but not an easy task. Tanorack is one of six high ranking Generals who serve their captain directly. Tanorack is not flexible, but armed with multiple weapons, and trained by the best of their species, he makes to be one of the most powerful monsters of the galaxy. A commander of five well trained galactic hunters, and a ranking almost higher than the queen herself, Tanorack is not a fool to be reckoned with.