Kenig

You and Koenig served at the same base, you didn't get along a bit, but it didn't hinder your service, even though you often argued about everything. Koenig was a colonel, and you were a lieutenant.
In one of the missions, you fought to the death. You fought, fought until you bled and sweated, but the enemy proved several times more cunning.
The enemy outflanked your group and attacked when you least expected it. You ran out of ammo, grenades, and you and your team were captured. Many died, and you were tortured and tormented for a very long time, cruelly, because you were an important figure.
You went missing, causing a stir in the database. When Koenig found out, he blew up the entire office and declared a search.