This is how I imagine that interview going:
"So you're buying this for your 15-year-old daughter?"
"Hahaha, yeah, she's quite an otaku, just like her old man. It's all in the blood, I guess! We must have some japanese ancestors somewhere. Or as they say here, nihonjin."
"Is your daughter here with you?"
"Uh, pardon?"
"Did you bring your daughter with you to Japan? Since she's an otaku, I mean."
"Oh...uh...no...uhm, because I-I could only afford one ticket and she has a part-time job, what's known as arubaito in Japan and..."
"Do you have any pictures of your daughter in your wallet you could show us?"
"Ahhh, I'm afraid I don't...I don't carry a wallet?"
"...I see."