Not to be confused with utsudere.
While a full smile on shundere character's face might be out of the question, their love interest can help them open up and feel accepted. They have a tendency to ignore and avoid others. They are sad all the time.
The second type of Shundere is that they don’t show their sadness to people and hide it all the time but they are actually really sad all the time.
Meaning of the Name Edit
The word is a compound of "shun..." (しゅん。。。), a Japanese sound effect representing melancholy, down, sad, depressed, etc., and "deredere" (デレデレ), which means "lovey dovey".