1. Rei Ayanami from Neon Genesis Evangelion
The character that started it all, Rei Ayanami is the framework for which all of the kuudere characters are based upon. The English trope for kuudere is emotionless girl, alternate name Rei Ayanami Expy. It can be said that she is the mother of kuuderes.
So what is it about Rei that spanned generations of beloved kuuderes? For starters, she has to fit all the description because she was the one that sets it.
Rei is an introverted character. This introversion throws off people and they assumed that she is just aloof and emotionless and they refer to her as a puppet. Character concepts also revealed that her introversion was intentional but never to the extent to which she can be called a person that is devoid of emotions.
As the series progress, she is shown to be able to feel and form human relationships. So there you have it! Beyond the fixated mask lies a character that feels love and of course ranks at number 1.
2. Mei Misaki from Another
It's no surprise Mei Misaki is emotionless, considering her entire class ignores her! But they have a good reason-they think she's cursed!
Like Rei, this kuudere has red eyes and a quiet demeanor
3. Kanade Tachibana from Angel Beats!
Being placed in a world where the whole world is seemingly against you. Tenshi is the student council president in the world after death. She originally appears as an antagonist for the series.
The reason why she exists in the world after the dead is a major spoiler and one that makes the anime one of the best in the industry. We leave it to you to find out why if you haven't started watching Angel Beats!.
Tenshi was the subject of much discussion amongst the protagonists. They are unable to discern if she is a sentient being or simply a programme that was initiated by the world. That is how well Tenshi mask her emotions and feelings simply for the sake of protecting everyone else, and how well she fits the kuudere type.
A bona fide kuudere, we simply must rank her as 3.