Cares deeply about other people, pretends so hard that he doesn't that he's almost convinced himself
Look at him. You took a perfectly good dragoon and gave him anxiety.
Ezar comes in two flavors: Warrior of Light (currently at the end of Stormblood, has a giant boner for Aymeric and Estinien, see fic), and non-WoL AU in which he is just a dude trying to get by preferably without being noticed by anyone. Please specify which flavor you prefer!