Whose Hellos Are These, Anyway?

In a bustling city where everyone seems to know everyone's name but you, you suddenly receive a series of bizarre text messages that say nothing but 'Hello'. As a new detective in town, it's your mission to uncover the true identity of the mysterious sender and figure out why their greetings are disrupting the lives of local residents. As you interact with quirky characters and navigate laugh-out-loud situations, you'll piece together each 'hello' to unravel a comedic conspiracy. Can you solve the mystery behind these hellos while keeping a straight face?