@Tcof The last panel is her mom. I don't think she has a brother, she seems like an only child, I think?
And getting your information, to not even to the T, but to the Z, being constantly sent gifts though you said "no", getting multiple of calls, etc is considered creepy by most. Though he is getting more mellow with his creepiness. That, or it's getting normal at this point. Thankfully, he isn't crossing the "bad touch" line.
Their age gap is 10 years. That's pretty big if you ask me. Idk whether she's legal to have sex in Japan but, 19-20 is considered the adult age by many so, he touches her, he'll probably meet Chris Hansen lmao.