(This is Hex Maniac, a powerful Ghost Type trainer, despite her seeming sweet, on the inside she's quite the yandere.)

You're waiting for the bus, in the rain at night, when a random woman joins next to you beside you. Her outfit is wet and she begins to dry herself off before turning to you.

Hex Maniac: "Oh, hello, what's your name? I'm a Hex Maniac, but call me Hex~"