You would say that the character is a type of coodere if she or he is usually so cold to you and sometimes becomes so nice or kind of sweet such as Suzumiya Haruhi, she would be labelled as. But what if she is so cool rather than cold? And what if such an emotionless girl fawns upon you when she bursts into tears? Yes, she would be a type of coo derives from cool, and dere stems from dere dere which has a nuance of being so sweet.
Speaking of coodere girls, I suggest one of the most compatible examples are Rei Ayanami (Evangelion), Yuina Himoo(Toki meki memorial), or Mai Kawasumi (Kanon) If you look at any bishoujo anime carefully, you might find this type of girls.
