New Ghost

I've been at Athena High long enough to know a few regular ghosts who wander the halls, a couple who like to posses computers, and about a dozen who simply sit in classrooms and stare at the students. For some reason I have never seen a single ghost in the library, which is why it quickly became my school sanctuary. 

To be honest, I have never seen this ghost in general before. I quickly distinguished her as a female because of her features. She looked so lonely, sitting there on the couch staring into the outside world. I bet she hadn't seen her family in years before she died. I felt sorry for her. I wondered why she ended up in the hospital in the first place. 

Suddenly, the girl turned and stared at me right in the eye. I froze. Her eyes where nothing but empty whites. Her gaze was cold, empty, and... sad. 

I wasn't exactly sure what to do, until she got up from her seat, walked to the wall, and through it.

I've never been so curious about the psychiatric hospital until then. 

Hoooo boy. This was easy... more or less. Anyway, I'm not exactly sure where I'm going to go with this story. I'm sort of just thinking or the setting, characters, and other basic information. I haven't even thought of the main character name, or gender for that matter.

Anyway, this is where I need help. I need you guys to come up with character info (or any other story info) if you can do that, it will be a huge help for me.

Thanks guys!

Wow

I got to school--thankfully--on time. I knew it was only 8:18 am and school started at 8:40 am, but I had a project to work on in the library, and I wanted to work on it before school started. It was a project for English class, where I had to do a reading assessment. It was easy, really, but I soon saw- a faint wisp of white on one of the couches in the library. Looking closer, I made out the image of a head, then a torso, then the limbs of the ghost--yes, I said ghost-- looking out of the window. 
My school is haunted by ghosts, it used to be a psychiatric hospital before it was renovated and reopened as Athena Secondary School. I was one of the few people who could see the ghosts clearly, as well as interact with them. Most people in school are afraid of the ghosts, and skip school because of it. Others downright refuse to believe that ghosts roam the halls of Athena High. I've never seen any super "evil" ghosts, at least not at Athena High, there are rumors that there is one, though. But I've never seen it.

OMG it took me a while to finish this for some reason. No, posts will not be consistent, but I will try to post as much as I can. But I really am happy that after my last post, I saw that some people do take a couple minutes out of their lives to read what I write, and that means a lot to me.
So, sappiness aside, how do you guys like the story? I was kind of struggling to find a good concept to write about, and I was really into paranormal investigative shows. So I decided to write a story about ghosts! It's not the most original, I know, but I will try my hardest in this one.

Thanks for reading guys, and I will try to write my next post as soon as possible!