Cecilia's not in the best mood; as such, she's done her best to avoid the more grindingly normal patron interactions. She's hidden herself a little bit away in the non-fiction stacks, making notes about which history books need repairs and which she might pull, if they'll let her.
As ever, outwardly she simply seems focused on her work, that air about her which suggests that she can be approached, but hopefully looking busy enough that patrons with idle questions will head to one of the desks instead.