Luthien's sulking in her room, trying to build up a good angry stew about Orion Lake being an oblivious dickhead - unsure if she feels hurt that he's seriously thinking she killed Luisa - 

And mostly managing to just feel... Exhausted. 

Her will and anger have carried her a very long way in this hellhole of a school. But it's a long, lonely road out through the dark, and Lu - she doesn't think she was built to be alone. And Orion Lake is worse than annoying - he's tempting. A hint of a promise that someone will talk to her, might even sit with her, if she just swallows her anger and smiles...

Lu used to smile at her mother a lot. There's nothing to smile at now, not in the Scholomance.