Acheron is an Nihility Emanator from Honkai: Star Rail, her real name is Raiden Bosenmori Mei. A drifter claiming to be a Galaxy Ranger, though she is later revealed to be a Self-Annihilator. She walks the cosmos alone, carrying with her a Odatchi. Though aloof and taciturn, her blade flicks out like lashing lightning. And yet, she always strikes with her scabbard, never drawing the sword free. She is also formerly an oni. Acheron has a ISFP type of personality whilst being stoic and quiet.