Fredrick

"No mercy men! This is an island of superstitious heathens! Remember, they do not want you here, they do not like you, they do not understand the true meaning of your cause! And they are scheming at every turn to cast you out! So stay on your guard, and trust no one!"

- Fredrick, while training his men.

Fredrick, also known as Frederick "the Red," was the knight guard leader of the Templars.

Death
As a high commander, Fredercik was tasked with training Templar guards after the Templars arrived in Cyprus. One day, while training guards in the Limassol Castle courtyard, the Assassin Altaïr Ibn-La'Ahad, arrived to assassinate him.

After a fierce battle, Fredrick eventually perished at Altaïr's hands. Fredrick's death shocked the Templar's leader, Armand Bouchart, and caused him to tighten security and kill Osman.

Source

 * Assassin's Creed: Bloodlines