The word dandere is exceptionally rare in Japanese despite being extremely common in English. The reason for this uncommon word being used for the dere type is unknown. In some dictionaries, dandere is also defined as the combination of dandyi ダンヂィ, "dandy," plus "dere". However, it's very likely that this doesn't have a relation with the origin of the word, due to it not being the meaning used in the west, and dandere being rarely used in Japan too.