Yandere

A yandere is a character archetype in Japanese fiction describing a person who is initially loving and gentle toward someone they care for, but whose affection becomes obsessive and destabilized, sometimes leading to violence or stalking. The term blends yanderu, meaning to be sick or unwell, with deredere, meaning affectionate or love-struck. The trope originated in manga and anime and has since spread to other media and fan communities worldwide.

Typical yandere traits include intense devotion, possessiveness, jealousy, and a tendency to interpret threats to the relationship as personal harm. They may display sweet, caring behavior alongside controlling or destructive actions. Mood swings, manipulation, and a willingness to harm others or themselves to protect the beloved are commonly depicted, though not present in every portrayal. Some depictions show a gradual slide into obsession, while others present sudden eruptions of violence.

Subtypes vary: some yandere characters are outwardly polite and quiet, using restraint to conceal impulses; others are more overtly erratic. The trope is often used to heighten romantic or psychological tension and appears frequently in horror-tinged romances, thrillers, light novels, and video games.

Context and interpretation: Yandere is primarily a storytelling device rather than a clinical category. Critics note its exploration of obsessive love and possessive attachment, while also warning that such portrayals can normalize unhealthy relationship dynamics. Viewers are advised not to imitate extreme behavior depicted in fiction.

Notable example: Yuno Gasai from Future Diary is widely cited as the archetypal yandere and has significantly influenced subsequent works in the trope.