- “Mullen's log. Day 789. 789 days. That's how long I've crawled through the mud and muck of Tuchanka. Hidden myself from all life, living off pyjaks and insects. But today that will change. Today one bullet will shape history. With one shot history will change and the Krogan Union will fall.”
- —Salck Mullen before his attempted assassination on Tikrog Kurvok, overlord of the Krogan Union.
Captain Salck Mullen was a turian spectre assassin and biotic squad leader during the Krogan Rebellions. Born on Palaven, Salck was a rare biotic and quickly became a turian special operations soldier with a skill for sniping and assassinations. He became a Spectre in only five years and went to the krogan homeworld of Tuchanka with a goal to live on the planet stealthily and spy on and kill leaders of the Krogan Union.