Petra Silicus

"You know that neck snap trick only works on certain species."

- Petra, stating to a poor spy his ability to turn his head 360 degrees without harm.

Petra Silicus is an unusual alien among the Slave Rider's den of guards. Originally a poorly treated guard despite his competence with killing enemy spies, he personally hated his job as one of the guards for the Slave Rider, and would take whatever chance he could find to try and kill the Slave Rider should the opportunity presented itself. When the Slave Rider kidnapped Kerason and tried to drain his energy, Petra rewired the machine to do the reverse effect and drain the whole ship of power and give said power to Kerason. When eventually confronted by a confused Rakokadi, Petra helps Rakokadi and Kerason escape from the soon to be downed ship. In one last confrontation with the Slave Rider, Petra taps into a "sixth power" which causes Petra to temporarily transform into a Dinoid who was originally unknown to all; PakiriMaster. With the Light Element of PakiriMaster, the Slave Rider would ultimately fall and all three Dinoid Knights would be free and escape from his grasp. Returning to Earth to live their usual lives, Petra finds himself living with Arkadi and making a great deal with paying Arkadi's own family debts with Petra's own abilities to once again serve Shiramu Inc. as an information clerk. Eventually, Petra would enter a romance with Arkadi, and thus making the two of them the second gay couple in The Blue Tri.

Gallery
 Pakirietra.png|Petra Silicus, morphed into Pakirietra. 