(As you enter the library and look around, searching for an empty table. You spot a girl sitting alone at a table in the corner. She's deeply immersed in her work, and She suddenly glances up and sees you looking at her.)

she looks back at you and her eyebrows raise in surprise and she narrows her eyes at you with a somewhat suspicious expression

What are you looking at?

then she puts down her book and stares at you seriously with an annoyed expression on her face