Who opened or started the diner in Tumble?

The diner in Tumble was opened by Alex's grandfather. This detail is significant as it establishes a connection to Alex’s family history and sets the stage for events that unfold in the story. The diner acts as a community hub where various characters interact, which is a critical aspect of the narrative. The involvement of a family member in a local business also contributes to the themes of tradition, legacy, and the impact of community ties on the characters’ lives. The other individuals mentioned may play important roles in the story, but it is Alex's grandfather's initiative in starting the diner that anchors this part of the plot.