Siarnaq

Siarnaq is a character appearing in Mega Man ZX Advent, being one of the 4 new Mega Man. He obtains Model P, and participates in the Game of Destiny.

Personality
His personality is monotone and robotic, making him seem almost lifeless. He is shown to be computer-like, and his speech is capitalized, making him seem more like a Mechaniloid than a Human/Humanoid/Reploid (for example, asking to "INPUT RESPONSE" and declaring "INCOMPREHENSIBLE." Other than that, he seems to have no personality at all, except slight evil, shown when the player is defeated by him and he laughs evil-like.

Biometal Era
Spoiler warning: Details of plots, secrets and/or endings may follow.

Siarnaq first appears after Grey/Ashe defeats Rospark and witnesses a Raider's soul being absorbed into Model W, along with [[Aeolus\\. He declares himself "Model P, the Shadow Mega Man" and states that Siarnaq is a codename. Siarnaq encounters the player once more, when the player tries to reach Legion, and fights Grey/Ashe, but is defeated and retreats.

Siarnaq appears in a flashback shown by the cipher, along with all the other Biometal users (excluding Grey/Ashe). He appears once more before the player faces Ouroborous, along with Atlas, Aeolus, and Thetis, trying to stop Grey/Ashe from advancing. However, a timed arrival of Aile/Vent distracts the four long enough for Grey/Ashe to get to the center of Ouroborous. It is then revealed that the four Biometals, including Model P, was stolen prior to Mega Man ZX Advent and was given away. They then "commence battle procedure."

After Ouroborous starts falling apart, Model Z decides to take down the enemy Mega Men by himself, and allows Aile/Vent to go rescue Grey/Ashe, who fainted after the battle. Model Z manages to freeze the four Biometals, which freezes the users themselves. The conclusion of the battle is unknown, since Aile/Vent did not mention anything about Model Z during the ending. However, if the player beats hard mode, then a secret ending shows the 4 Enemy Mega Men alive and well, in their MegaMerged form.

Trivia

 * If Siarnaq's secret disk is obtained, it is revealed that Siarnaq's personality resulted in a betrayal in his past by his fellow comrads and left for the dead.