Yandere/Myth and Legend

• Pele - the Hawaiian Goddess of Lava is known for her fiery temper. She fell in love often and most of those young men were not fortunate to escape with their lives. The incredible details of some of the stories is what really makes her special. In one story Pele throws Lava at her Lover, her own favorite little sister, the sister's House (forest, actually), and sister's Best Friend for good measure. Because she THOUGHT the Lover and Sister may like each other, when in reality they were both totally loyal to Pele. (Of course they bonded because of this trauma and proved Pele right. Irony Burnnn) The Other Wiki tells the tale
  • Also another unfortunate young man that Pele fell in love with was already in a totally happy relationship, and had no intention of cheating on his girl, even with a Goddess. Pele was not impressed by his moral fibre. Story of Ohia and Lehua
• Dido in The Aeneid. When Aeneas leaves Carthage, Dido curses him and all of the surviving Trojans, then commits suicide. It bears mentioning that said curse involves damning their two future nations to constant savage bloodletting.
• There is a Japanese folktale concerning a woman named Kiyohime who, when rejected by the object of her affections, turns into a dragon and kills him. More information can be found on The Other Wiki.
• The huldra of Scandinavian folklore are a type of fairy who appear as beautiful women with cow or horse tails. Although they are often eager to marry, they are also very strict and demanding, and if you even think of turning one down, she will kill you.
• Ishtar (Inanna) of Mesopotamian Mythology. All of her lovers ended up dead, which is why Gilgamesh turns her down when she asks him to marry her. Cue Ishtar running to her daddy, pitching a fit, and threatening to cause a Zombie Apocalypse if he doesn't give her the Bull of Heaven instead (even though doing so will cause a drought.) She later has her husband Tammuz/Dumuzi Dragged Off to Hell for cheating on her while she was off trying to conquer the underworld.
• The story of the four winds in Lakota mythology. They were all in love with the goddess Wohpe. She chose the South Wind, due to the fact that he wasn't so vocal about it. The North Wind tries to steal her away from his younger brother every winter. It should be noted that the North Wind is represented by the color white, and the South Wind is represented by the color red.
• In Classical Mythology, Persephone turns a girl into a mint plant, and then stamps on her, for daring to flirt with her husband Hades. The weird thing is that Persephone ended up as Hades' wife when Hades captured her and forced her into marriage, so it must take some extreme Stockholm Syndrome for her to not only grow to love him, but to become jealously protective of him.
  • To be fair, besides kidnapping and tricking Persephone (a by product of which is causing winter to happen) Hades has never done anything all that bad.
• The most famous example from Classical Mythology would be Hera, wife of Zeus. Half or more of the myths about her and about the only thing she is remembered for is pursuing horrible vengeance on the lovers of Zeus and their offspring. The worst acts were probable against Lamia and Hercules. Hera either stole or in the worst stories forced Lamia to kill her own children turning her into a monster. The latter she tormented his entire life in one way or another, but the worst would be inflicting madness on him causing him to murder his own family. The 12 Labors that made him famous were ironically for a crime he arguable had no control over. She seemed tolerant of Ganymede, however.
  • Only seems: the arguments over Ganymede are very sexist, and NSFW too. Highlights can be found online if you are really curious, but it mostly raises the question of What Does She See in Him?. Any 'she.'
• Medea of Greek myth killed her kids when Jason left her.
• God loves us, but He's quite jealous: It's the First Commandment.