Name of Geass: Treu Loyalty

Type: Anime

Power/Ability: Forces a person to be/become loyal to whatever his true memories and experiences add up to. It can work on the same person multiple times, but only if they have gained a true memory and/or experience of importance. The Geass's effect spreads out in a circular sphere originating from Erina, but the affected targets are those of her choice. It automatically activates should Erina be Geassed by any other Geass, and affects everyone in its 100 meter range.

How did you get it: From M.M. when she was saved by her at the age of 6.

Sample Use:
"I don't have anything to hide," said the restrained person. He looked left and right before noticing Erina. "Hello there little girl. Don't you believe me? I'm loyal to my word."
Erina sighed and rolled her eyes in annoyance. She activated her Geass, and picked out the guy as the only target.
The guy went silent and glared at Erina. "That wasn't smart missy."
"Any last words?" asked Erina.
"Die little b-"
Erina darted forward, drew her fan, and slit the guy's neck before he could finish. She wiped the blood off on the dead guy's corpse and dropped her fan in the sink and washed it. "That was worth it."