Meet Willow! Willow Wisp is an old OC of mine who is basically like an older version or Ghostie, that in saying the only similarity is the ghost seeing thing. 

6 years ago, I created Willow, but I never made a backstory for Double W, so I'm making one for her!

Lore Dump: Willow Wisp

Willow was a young student at Celestia's school of Magic, one day, she cast a spell to let her see into the world of Spectres, she quickly began to fall into misdirection and disorganization due to her studies on spectres.

Her studies kept her awake all night, and the spectres often pestered her, some in the malicious sense and others to mess with her. 

Eventually the spirits drove her to leave the school and flee into the Everfree, not wanting her outbursts due to the spectres to bother anyone else, she was never seen in Ponyville again, now she's a bit of a mystery told through Equestria.