hard-boiled action type
+
to ship with tadokoro's mom
+
based on a familiar character from some franchise like tadokoro's mom because artistic parallels
I'm guessing it's police, since it took about ten minutes. They probably had to run her picture through facial recognition against known fugitives or something.
It's been so long? What do you mean she's not the first one?!
Probably when she was a little kid...
Yeah, taking 15+ minutes to decide? Something unusual was going on over at the other Mom's end... police investigation? Or hired detectives? (They're rich, right?)
How has nobody mentioned the bottom of page 2 "I was asked to take a picture of you, Ma'am"? In my mind I was going ALERT, ALERT, ALERT, NEW SHIP ALERT, TATSUBON IS NOW SHIPPING NIKAIDOU'S MOM WITH TADOKORO'S MOM, ALERT, ALERT
I thought she just wanted a picture of her mom to be honest, but looks like she actually needed it.
That's to prove where she is. You see the same in other manga too.
(at least usually that's the reason)
I figured her parents would use it as proof that she was at a friends house, but also thought they might use the gag that it was a pretense to get her moms picture too