Are tsundere/yandere/kuudere unisexual terms?
The dere family along with tsundere (unapproachable outside, sweet inside), yandere (sweet outside, crazy inside) kuudere (cold outside, sweet inside), and dandere (asocial outside, sweet inside).

All of these terms are used to describe traits, rather than the characters themselves, so they are used asexually. However, because the terms (most prominently with tsundere, since it is the most popular trope of the family) are attributed mostly to female characters, people usually attribute the terms as female traits.