Answer: The mayor, Le Comte Reynaud
Le Comte (masterfully brought to life by Alfred Molina) is going to be the main antagonist of the film, so it is fitting that we get an early impression of how he feels that he is the personification of the town. (In the original book, it was the parish priest who led the opposition to the opening of a chocolate shop, but in the film Pere Henri is shown as being, at least initially, under the control of Le Comte.) In this opening scene we learn that we are at the start of the season of Lent, a time when Christians traditionally engage in some form of abstinence. As the wind blows the church door open, the imminent arrival of Vianne Rocher (the protagonist of the film, played by Juliette Binoche) and her daughter Anouk, and the subsequent disturbance of the town's vaunted tranquility (from which Le Comte obtains much satisfaction), is presaged. We then see the two of them, dressed in vivid red cloaks, struggling up the hill towards the town.