A Dorodere, sometimes spelled Doredere, refers to a character who acts cute and sweet on the outside, but is deeply disturbed on the inside. Despite everything, they will never really do the dark things they say and think. Dorodere characters have Sadodere, Yangire or Yandere thoughts, but usually don't act on them.

The word is derived from the terms "dorodoro" (ドロドロ), meaning muddled or confused, and "deredere" (デレデレ), meaning "lovey dovey".

source: https://the-dere-types.fandom.com/wiki/Dorodere