It depends. If the portrayal of the yandere girlfriend is done in an interesting and nuanced way, it could be appealing. But if it's overly stereotypical or one-dimensional, then no.
Most real - life 'yandere girlfriend' stories are not as extreme. Often, what seems like yandere behavior can be a result of insecurities. A girl may have had bad experiences in past relationships or might have self - esteem issues. So, she acts overly protective or jealous. However, it's not the same as the full - blown, often dangerous yandere concept from fictional works.
Communication is key. Sit down and talk to her about how her behavior makes you feel. Let her know that her excessive jealousy or possessiveness is not healthy for the relationship.
In yandere x reader fanfics, yanderes usually display intense emotions. Their love for the reader is not the normal kind; it's more of an obsessive love. They may have a dual personality where they can be extremely sweet and loving one moment, but if they feel threatened in their relationship with the reader, they can turn very dangerous and menacing.
Yandere characters in these novels are often extremely possessive. They see the object of their affection as solely belonging to them. For example, they might get angry or even violent if someone else shows interest in their beloved.
One of the well - known yandere characters is Yuno Gasai from 'Future Diary'. She is extremely possessive of her love interest, Yukiteru Amano. Yuno is willing to do anything, including murdering others, to ensure that she is the only one in Yukiteru's life.
Typically, the yandere character in yandere visual novels is overly possessive. They will go to great lengths to keep their love interest to themselves. This may include eliminating any potential rivals, either through manipulation or more extreme means like violence. They often seem sweet and innocent at first, but as their jealousy and possessiveness grow, their true nature emerges.
Annabeth could potentially be a yandere in some fanfictions. Since she already has a strong connection with Percy in the original series, some fanfic writers might take that to an extreme, making her overly possessive. Another could be a new, made - up character. Maybe a demigod who has been watching Percy from afar and then develops an unhealthy obsession.