What is the characterization of great gatby character in Fitzgerald work?

Jay Gatsby is characterized initially as a charismatic and enigmatic figure who nevertheless revels in a vacuous lifestyle, always throwing parties to attract the idle rich. But as Nick gets to know his story better, he learns that Gatsby is actually a tragic figure, who was born poor but was desperate to the know the power of wealth, so much so that he created a new identity. So at the center of Nick's initial impression is a deep sadness that hides the desire to be admired and appreciated.

Fitzgerald intentionally delays the reader's meeting with Gatsby to build a sense of mystery. The first glimpse of Gatsby is at the the end of chapter one when he is seen mysteriously reaching out to the green light across the bay. Gatsby is shown to be completely devoted, some would say obsessed, to his love for Daisy. He throws elaborate parties, hoping she will attend. He sets up the meeting with her at Nick's, where his obsessiveness is clearly on display with his answer of "Five years next November," referring to how long it had been since he had seen Daisy. His criminal side and willingness to do anything to obtain Daisy is revealed through his criminal dealings to obtain money, seen clearly in his meeting with Wolfsheim. Fitzgerald later fills in the gaps about Gatsby's poor upbringing, which shows a great deal of determination on Gatsby's part while generating sympathy from the reader. James Gatz is then characterized in a completely different manner than Jay Gatsbt.