Klaus's eyes widened.
That was certainly a strange thing to ask someone else, especially a guy who happened to know her sister. By the way, why was there an awkward pause before she said 'Sister? He wondered silently, staring at her face.
More importantly, how was he supposed to answer that question?
After some thought, Klaus sighed, rubbing the back of his head in mild frustration. His voice took on a somber tone as he tried to put his thoughts into words.
"That's… a tricky question. How do I explain this without sounding rude?" He hesitated for a moment before deciding to be honest. "Your sister is… strange. Not in a bad way, but her personality, the way she speaks and behaves, it's all just… off. She talks in this monotone voice, like she's a spectator in her own body rather than the one in control. And she does anything you ask of her, no matter how weird or inappropriate. Sometimes, it feels like I'm talking to a robot."