tsundere and yandere?

I'm pretty sure Tsundere is like a person that seems really mean towards someone but softens up to that person at one point atau another atau someone that is usually mean in general but occasionally shows a softer side.

It's kind of like the person that beats up their crush a lot but really does care about them. Mio and Ritsu from K-ON! are a pretty good example. Mio beats up Ritsu a lot when she's being dumb but when Ritsu got sick Mio showed deep care for Ritsu. It makes lebih sense if you've seen it.

As for Yandere I have no idea but it makes me think of John Deere.

Well basically The Term "Tsundere" is a type of character who is generally hostile(unfriendly/antagonistic),or cold to another character before gradually tampilkan their warm side to them over time,the word is deranged from "Tsun Tsun" meaning to turn away in disgust and "Dere Dere" meaning to become "lovey dovey",
While Yandere,you could say means the exact opposite,where a character who ideally loving and gentle to another character,before tampilkan their destructive and violent side the term is taken from the term "Yanderu" meaning "mental" atau "emotional" illness and "deredere" meaning to tampil affection!..anyway I really hope I helped!..also a visual an example of a Tsundere character is Airi-chan from the anime "Mashiro-Iro Symphony:The warna of Love" and an example of a Yandere character is Rena-chan from Higurashi! so anyway I really hope I cleared it up,for you..even if this helped just a little.

A Tsundere is basically someone who shows a violent and destructive side (i.e. beating them up atau scolding them often) towards someone they truly care for. A Yandere is the opposite.

A good example of a Tsundere would be Kirie from Girls Bravo