Your character is motivated by pure JUSTICE.
You are Amanda Tetrus's personal bodyguard, and have been for four years, and were her father Armand's for thirteen years before that. It has been two years since you learned that the head of Tetrus House, Armand Tetrus, slew your tribe, your family, and enslaved you. You had been told that you were rescued as an infant, but you now know that that was a lie. Now, you seek JUSTICE. It is not enough to slay Armand in his sleep - a death in private is happenstance, it is not JUSTICE. No, for it to be JUSTICE, it has been be is seen by the people, and the people have to know why. You have been waiting for the perfect moment, gaining respect and trust in the House as a bodyguard, to be by Armand's side when he announces his daughter's succession.
There are certain special cases where these abilities might fail, but these cases are revelatory to your character's arc, and move the plot forward. When an ability spending inspiration fails, special things happen.
You are an Orc, age unknown, but likely mid-30's (approximately 55 in human age). You were adopted as an infant by Armand Tetrus and trained to be his squire, then his bodyguard after that. You became Amanda's bodyguard when Armand realized that Amanda needed a personal bodyguard on her military campaigns. You discovered Armand's treachery from an anonymous source, and verified the truth of it from long, hard, secretive work. You are called 'The Red' for several reasons, the two most common being: The first being your skin color - most orcs are green, your skin is a reddish brown; The second is due to your reputation as a great combatant, bloodthirsty and victorious, and red symbolizes victorious slaughter.