Who your neighbors would be in Marbella (an area in the city of Panamá) is difficult to describe, as there is a combination of Panamanians and foreigners who have purchased condos, but many of whom don´t live there full time, and only use their condos when they visit or for vacations.
Talking about the city of Panamá in general, your Panamanian neighbors always welcome any new family into the neighborhood or building. Panamanians are very curious to know who are their neighbors, for reasons of safety and friendship, as well. Panamanians do everything to make your stay in the city the best possible. They will bring food as soon as they meet you, or introduce themselves to help you with your move, and make your move more relaxing and pleasant. As soon as they know you better, they will invite you to their apartment or house for a "coffee", which actually is a nice chat to make you feel at home.
A resident in any part of the city of Panamá, Marbella or any other neighborhood, could very well be a foreigner, who lately have been coming more and more on a daily basis, mainly from the US, Canada, Europe, Venezuela and Colombia.
It´s not unusual for you to hear several languages while you walk in the mall, or go to a restaurant.
It is advisable before you make the final decision to buy a property or move, to visit the country several times, stay in a hotel at first, and if you like the area, maybe rent for a while.