Jackson is a young ambitious Alchemist with an arrogant, egotistical attitude. Throughout the series however, he develops a certain leadership and resourcefulness that prove unique and helpful to the Regalian Resistance, despite his youthful age. His overreliance on alchemy is tested throughout the show, also revealing his intelligence and observance. 

Jackson's voice should come across as a walking awkward ego, as he believes he knows more than most, but is still a somewhat reserved teenager.

Personality: Mature, Arrogant, Know-It-All, Intelligent...