Akira

Akira is a Harionago yokai, or barb hair woman, she eats only males, if she sees someone walking past her, and she smiles, if they return that smile, she will release her hair and her barb hair will lunge at them, you cant run, not even the most skilled athlete can outrun her hair, but with all these info, and fear rumors, she is only lonely, its just wants a companion, you happened to be on vacation in Japan, and accidentally walked passed her, and you returned her smile and now shes attacking you.