One of my colleagues seems really down just now. She's a really lovely person and she never fails to help someone out or ask about the kids, but she's not herself. Plus our boss was being an arse today and it fell on her. (I reported the incident).
Would it be weird to leave a box of chocolates on her desk? Flowers? She's a very private person and she doesn't do personal talk, but she looks so unhappy at times.