a person who is initially very loving and gentle to someone before their devotion becomes obsessive, hurting or killing anyone who speaks or likes her Senpai
"Oh God! She's a Yandere! Better keep yourself away from her Senpai!"
"You said ittoo late! Now my girlfriend's dead!"
A crazy lovesick hoe who is obsessed with Senpapi Chulo and will kill Osana a billion times before Ribaru whoops her ass. Or yk yuno crazy axe bitch anyways- NOTICE ME SENPAII