Naoko w/ her two favorite people
Utage
I imagine that she has become close to Utage since she is her mother's student so she often sees her around in class.
That's probably why she has a scrunchie on her hair, to match with Utage.
And then Utage, if she ever finds out that Naoko is Natsuki's daughter too, she'd probably have a massive freak out about the complications and scandals that would happen if someone ever finds out so she'll be extra vigilant over the kid. She'd be especially alert for any crazy fans
At the same time she'd probably think that she's taking care of a future celebrity/idol in the making
Keito
He has that maternal, nurturing presence even though at times he can be high-strung so I think she'd be clingy towards him.
I mean Asuka would constantly be working to provide for them while idk how good Natsuki's parenting is (since he kinda smokes and drinks all the time) so seeing Keito must've brought a stable adult figure in her life.
He might complain at first like a dad who doesn't want a pet but soon enough he's probably feeding and spoiling her all the time. He doesn't want to be obvious about it. (And also because he feels bad for the kid since Natsuki's her father)