If you've met, I'd say that's definitely enough to designate you as friends, as far as Ren's concerned.

[ Trust her, she'd know. And Ren is a very good friend to have.

Oh... Pikachu is too cute for his own good, how can she argue with that? ]

Okay, then. Thanks! Take a seat and make yourself at home. [ Ann, this is NOT your establishment-- ] Do you guys want anything to eat or drink?

[ She can probably find something, she knows her way around Leblanc pretty well back home... ]