Usually a kid or teen (Ages 7-14)
They made this name as it sounds "cool" and "edgy" and thinks its one of the best things they named.
Maybe sometimes annoying and loud, but still is mostly cringe most of the time when talking to them.
Expectation
Person 1 : I'm QuickZix
Person 2 : That's so hot and sexy
Reality
Person 1 : I'm QuickZix
Person 2 : That's pretty cringe