Tsundere-Standard "Harsh outside,soft inside" type,acts rudely but is really a huge softie after you break through their shell.
Yandere-May appear all-loving and kind at first,but can get very aggressive,obsessive and violent when it comes to her or her lover's affections.
Kuudere-Initially acts cold and distant,but becomes affectionate after they open up to certain people.
Dandere-Might appear very silent and even emotionless at first,until someone "pulls their trigger" and it comes out that they were just shy.