Severus tapped on the door to the office Harry shared with three other graduate students. He was meeting Harry so they could go to lunch together.
"Hope I'm...." Severus knew his voice trailed off as he caught sight of the young lady barely clad in a Santa costume sitting with Harry. He forged on, "... not too early."
Harry beamed as he caught sight of Severus. "No! We're just done here!"
"And I've got to go and meet the others," the young lady said.
"Severus, meet Nathalie. Nat, this is Severus," Harry introduced them with a vague wave of a hand.
Nathalie stood, turned to face Severus and held out her hand. "I've heard so much about you," she smiled. "Glad to meet you."
Severus made sure to make eye contact as he shook hand with her. "And I am glad to meet you," he said solemnly. He firmly kept his eyes on her face.
"Gotta run! Bye, Harry! See you in class!" she said as she left the office.
Severus looked at Harry who was trying not to laugh. "You should see the look on your face!"
"How is she not cold?" Severus said, before he realized he had said that aloud.
Harry did laugh outright.