Yandere-chan

You play as Yandere-chan, the main protagonist of the game. At the beginning of the game, you have a dream about Senpai. That morning, you run into him as you are late for school - and become obsessed with him. Nothing and no one will stop you from having him.

Every week, a new rival appears - one that you must find and kill before the week is up, or else they will confess their love to your Senpai.

Appearance
Yandere-chan has pale skin, black hair and grey-black eyes. In her default uniform, she's seen wearing a blue and white uniform shirt with a blue skirt, with black leggings and shoes.

If she runs behind the tree on the side of the school she's wearing a red and black version of the default uniform. This will not be in the final version of the game, as it it a debug build-specific easter egg.

Personality
Yandere-chan is, as in the name, a yandere - one who will go to any lengths, even kill, for their love.

In an early version of the intro cutscenes, Yandere-chan was not inherently a yandere - she was coerced into it by Info-chan, and was apprehensive of the idea of killing another person.

Background
Yandere-chan, apparently, has some history with being a yandere. In the aforementioned early versions of the intro cutscenes, Info-chan mentioned this twice.

"So, history is repeating itself, huh? Time to test a theory..." Said after Yandere-chan rushes to school after running into Senpai.

"I'm sure you could. It's in your blood, after all." Said after Info-chan asks Yandere-chan to murder a fellow student.