She starts looking for people in her own world she'd be less thrilled to see. People who she knows to be dead.
Lynnis would be one thing, although Lynnis would not necessarily be happy to see her.
She checks for Coriolanus Snow.
She'll ask the librarian. But first she'll fingernail Snow's code into another file margin with a little six-pointed snowflake-y star next to it. She's going to look up where that is, and then never, ever visit that neighborhood.
She can't think of anyone else to look up.
She goes back to the librarian. "I looked up someone from my world who died when I was sixteen, and she wasn't there. Why might that be?"
"Upside? Is that the place above the cliffs? What makes some people go there and not others?"
Shell Bell nods. "Can you tell me how to navigate the stacks?" she asks. "And do the computers do anything besides look up dead people?"
"So I use the computer to see what books there are to be had, and then I ask one of you to fetch it?"
Holmes. He can be "Holmes". Her Sherlock is Sherlock. They never did figure out a nicknaming scheme, but the other Holmeses she's met are less important by far than the one she can actually get at today.
She goes back to the station, and deciphers the code she imprinted into her file, and travels to the home of the dead Sherlock Holmes.
He maybe looks like he could be an older Tony, though. Maybe.
Yeah, Shell Bell wasn't holding out for anyone that close. "Hi," she says. "I don't think you know me or anyone like me, but before I died earlier today I knew - several people with your name or a variant, and I wanted to see if you were an alt of them. I think you might be. I'm Shell Bell."
"Nickname you picked up here?" she asks. "That's not the name I found you by."
"You will find that almost no one uses the same name here that they did in life," he says. "I am no exception."