His cheeks flared up in response, more or less embarrassed that he'd been founded out that easily. He didn't think that this girl had met her! Though he had yet to meet this Riona girl, Shirou knew exactly what Marisa was talking about when she mentioned that other name. Taken aback, his body shivers slightly when he thinks about what she might have done to him if he willingly outted her.

"Y-You know Tohsaka?!"