Gizmoduck, if you don't already know, is the highly regarded superhero of Duckburg and his deeds of derring-do have spread to her sister city of St. Canard. He pilots a large robotic suit with a seemingly endless supply of drawers and flaps to provide him with any number of useful tools for combating the forces of darkness and occasional jay walker. Always in the spirit of the greater good Giz will aid whomever he feels is in need (usually with little consent and with a bit of dramatic preamble). He has been on the superhero scene for a number of years and has had great success as well as almost instant admiration. (He has his own fanclub he refers to lovingly as the "Gizmobuddies" and blindly assumes that everyone: 1) knows who he is 2) is a fan of some sort 3) wants an autograph 4) is an ally who has come to lend a hand or 5) the only other option is a villain. ) Forever an optimist he labels all heroes he encounters as friends and cherishes what he considers a particularly strong friendship with Darkwing Duck.
Not in the common knowledge the mallard behind the blast shield is Fenton Crackshell. Fenton, although enjoying great success as his heroic counterpart, is typically more unsure of himself. Playing hero has clearly taken over a huge part of his life but once the suit is off he seeks out approval from most new people a little like a lost (kicked) puppy. His origins are a humble one: growing up with an agoraphobic mother in a run down trailer park. Though seemingly out of his depth in many (read: nearly all) things Fenton has an affinity for numbers and can do complex counting and calculations in his head at the drop of a bean. Bean counting was his job before fate and happenstance brought him to the Gizmosuit and eventually he became Scrooge McDuck's bodyguard/underpaid accountant. Fenton can have his selfish whims but mostly he is a fount of kindness and as a result, normally a doormat.