In works like this, there are usually local villagers as important characters. They would contribute to the local color and atmosphere. They might be the ones who interact with the main character, like the shopkeepers, the farmers, or the old gossips in the village. They play a role in shaping the main character's experiences and the overall story. There could also be a love interest, perhaps a woman who catches the main character's eye and changes his life in some way.
Since it's set in Ireland, there could be an older, wise character, like an old man in the village. He might be the keeper of the local lore and traditions. He could guide the younger characters or give them advice. And of course, the main character, who could be a man trying to find his place in the world, in the midst of the Irish community. He might be dealing with issues like family expectations, love, and his own identity.