Dottie, Finnley, or Malachi would probably be the easiest ones for randoms! Finnley already knows much of the Rojas crew thanks to Charlie, but I'm not sure if she's met Mateo in person or not yet! I know she talked to him to welcome him to the town via the network. Dottie is generally friendly and very Luna~esque, and Mal works at the local coffee shop, attends UofD, and has like half a dozen volunteer projects he participates in. xD