Ask her if anything is wrong.

You definitely heard a hint of sadness in her voice back there. You decide to press on the matter.

"Erm...is anything wrong?", you ask rather awkwardly.

Lucia steps back, seeming rather riled by the statement. "W-where did that question come from?"

"Well, you just sounded kinda beaten down back there...", you explain, bringing a hand to the back of your head. "Sorry if I went too far."

She gives you a stoic glare, before eventually sighing and looking away. "I just had a small argument with my friends. Nothing big."

You tilt your head at her. "What about?"

"I'd...rather not answer that.", she replies, sighing.

She seems even worse off than last time. What should you do?