Whose Hello is it Anyway?

In a world where greetings are powerful and carry weight, you play as a struggling greeting card writer who accidentally stumbles upon a conspiracy to control the world through customized salutations. Each greeting you craft leads to new bizarre situations, twisting relationships, and unexpected allies as you unravel the mystery behind the 'Great Greeting'. Can you figure out whose hello makes a difference while navigating through humorous and dramatic encounters with quirky characters, each with a distinct way of saying hello?