To put it simply flare got none of this from his father but he is a hothead and that should be played into his whole character. Being the first born flare is a big guy and he's trying to be the best of the best but under that tough guy personality he's a sweetheart who honestly just misses his mama who he doesn't really know but he kind of her members. He needs to scream hero energy and he is the protagonist of everyone story. He's brash, quick to answer and you should put 110% in any time you do his lines, but as time goes on remember that flare is also going to need to have a softer side to them and most importantly flare flare is a tough guy needs to be tough in his eyes and he's the strength. Named after fire you should embody the idea of what you think a fire based protagonist would be, have fun with it and go all out don't hold yourself back like flare.