Actually, redhead with the home-done pixie cut is somewhat younger than Yuyuyu though since she's also somewhat on the "freakishly tall" side the mistake is forgivable.

Yuyuyu may or may not make note of the fact that the girl who answered the door has a sound village forehead protector wrapped around one of her arms... The fabric on it looks slightly different though. Looks "stretchier." But she wouldn't have seen her at the academy.

If Yuyuyu looks down, she might note some rather extensive black tattoo work on the robed girl's legs.

"I would not know, I am usually not here to receive the mail in person. And yes, I am here alone. I am not sure why that would be impressive."