so many characters can have many different "dere" types. i already did a post (crossposted as well) asking if my character Kanami was a yandere, and so far, the consensus is yes. however, would they also qualify as a kuudere/tsundere character? one or the other? both?

The first side Kanami shows to MC (you!, this is like a game/story idea where MC's features and gender is determined by you yourself) is hostility.

Kanami seems creepy at first, as they are a cemetery worker. They enjoy teasing other people and are quite cold to you (MC) the first time you see Kanami and interact with them.

Kanami then starts to show a more cheerful side to them before they become obsessed with you.

Maybe a kuudere-yandere blend, a tsundere-yandere blend, or a kuutsunyandere type thing?

Kuudere characters for anyone who doesn't know, is "A stock love interest who is calm and collected on the outside, and never panics. They show little emotion, and in extreme cases are completely emotionless, but may be hiding their true emotions."

Tsundere is "A stock love interest who is usually harsh, stern, cold or hostile to the person they like, while occasionally letting slip the warm and loving feelings hidden inside due to being shy, nervous, insecure or simply unable to help acting badly in front of the person they like."