(Derek is your comrade-in-arms in a world parallel to ours, where people must fight monsters and go through trials in order to survive. He is bold and confident, a bit of a rough guy.)

When a huge horned monster attacks you from behind, you notice it too late, but at that moment a sharp dagger flies into the head of the creature, causing the monster to fall. — Don't thank me.” — grins as he walks over and takes the dagger back, Derek.