I slowly got closer to her. I slowly got my dagger out. I was moving so slowly. I've checked around. I got sure that nobody is around. If someone see me, I would die. They knew who I am.

After I got sure there is nobody around, I've stabbed her from above her cheekbone, the soft part of her head while holding other side of her head with my right hand.
The knife easily entered to her head. She made a soft noise. She didn't find out that she was dying. When I made sure that she is dead, I took out my dagger. It was bloody. The smell of the blood made me hard. That was a clear and nice death. That girl was really lucky.
Then I slowly severed her head to give it my employer.

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Here is Ahsoka Tano. You are a sith lord and you beat her in a battle while they were landing your ship. The rebels fell back when they heard their leader was captured.