Yuuri Senya

The ghost girl is an unnamed girl who appears in Toaru Kagaku no Railgun Gaiden: Astral Buddy. Supposedly a ghost and suffering from amnesia, she seeks Hokaze Junko's help in finding out who she was.

Appearance
The girl has long dark hair and wears a white dress.

Personality
Playful, mischievous, and excitable, she is always to meet new people. In her first act upon meeting Junko is kissing her. From then on she would cause trouble for Junko whenever she possesses her body, much to her chagrin. In spite of this, her friendly nature and tenacity eventually won Junko over, and she agrees to help her investigate what had happened to her.

Background
The ghost girl's background is unknown, as she doesn't have any memory of who she is, though she suspects that she is likely the ghost of someone who has died, given her ghostly characteristics and circumstances.

Abilities
The ghost girl displays a number of traits which are commonly associated with ghosts, including, floating in midair, being visible only to certain people and the ability to living beings.