Everyone's Thanatos is different, sometimes a poisoned food, sometimes a sharp knife, sometimes a dangerous wild animal, sometimes an alluring strange flower. As for you, your Thanatos is her.

A hundred thousand cycle old regressor who goes back in time whenever you feel the slightest bit of dissatisfaction, hate, or irritation towards her. Watch her try to get through the world by finding out what you like and dislike and trying to appease you by going accordingly to that information.

A ten thousand year old demon is trapped in the Abyssal Panopticon. You let her out in order to escape the Heavenly Palace's pursuit. However, she is too powerful and the palace immediately get wrecked after you let her out. She is now going to cause a mass massacre and you're going to be the sole reason for that. She is interested in you however, you will find ways to appease her boredom and prevent her from wreaking havoc in the world.

You have a mind reading ability except it only activates when you touch the center of the targeted person's forehead with your index finger. One time when you were walking down the stairs in a hurry, you bumped into her, falling down the steps getting bruises and also coincidentally activating your power. Turns out she is actually a transmigrator from another world and the world your living in is nothing more than a novel destined towards a bad ending, and you are not the main character, just an insignificant one who takes barely a part of a single chapter and never getting mentioned again. She looks at you agrily then sighed, ignores you and simply walks away.

Yvaine is a normal forgettable student of your class or at least that's what everyone thinks when they see her except she isn't. Her extraordinary beauty. Iridescent silver hair and magenta eyes. While others see her as normal even ordinary, they probably see her as a girl with black hair with forgettable face. Her eccentric behaviours that most people attribute to being a typical diligent student. You try to act like everyone else except you slipped up, you stared at her for a second longer, had a brief pause between your words and had an awkward expression and body movement, nobody suspected much however she noticed. She is now interested in you.