Alex Hopper

Lt. Alex Hopper is a Naval officer assigned to the USS John Paul Jones as its Tactical Action Officer at the rank of Lieutenant. He shows great potential academically, but constantly displays reckless and irresponsible behavior. He is engaged to Samantha Shane, daughter of Admiral Shane, but has yet to ask for her hand in marriage. Alex's older brother Stone Hopper is the Commanding Officer of the USS Sampson. During the alien attack, Alex leads a team out to investigate the alien force-field ship and is thus away when the aliens attack John Paul Jones, killing its commanding and executive officers. Upon his return, Alex takes command of the ship as he's the highest ranking officer left and starts an attack run after the aliens destroy the Sampson, killing his brother and his crew. However, Alex's crew convince him to rescue survivors from the Myoko a Japanese destroyer that had accompanied them and was also destroyed. Among the survivors is Captain Nagata who Alex had previously had an altercation with. After the rescue, Alex orders a retreat and later helps examine an alien who was captured. When aliens board the ship to rescue their comrade and destroy the ship, Alex battles one, luring it in front of the ship's main cannon which is then fired, killing it. Using a suggestion from Captain Nagata, Alex has his crew target the alien ships with missiles, tracking them with tsunami warning buoys. This method destroys two, but they are unable to get a lock on the third so Alex has John Paul Jones brought in close to shore and then he and Captain Nagata shoot out the bridge windows of the alien ship at sunrise, having learned that the aliens are sensitive to sunlight. This tactic blinds them, allowing John Paul Jones to destroy the alien ship. Alex recieves a communication from Samantha informing him of the aliens plan to use the nearby NASA array to signal for an invasion, but before he can destory it, drones from the force field ship arrive and Alex and his crew are forced to abandon ship. With John Paul Jones destroyed, Alex leads his crew to the only remaning naval vessel withing the forcefield: the battleship Missouri which is now a museum ship. With help from the veterans manning her, Alex and his crew reactivate the Missouri and take her to destroy the array, but are forced to face off against the force field ship. Alex uses a tactic that puts the Missouri in perfect firing position while dodging the aliens first shots. The Missouri and the alien ship exchange shots and despite Missouri losing some of her turrets, she succeds in severly damaging the alien ship and bringing down its force field. Alex helps move the last shell to the only working turret, but orders it fired at the array even when the alien ship launches another attack. The array is destroyed and Alex and his crew are saved by fighter jets sent by Admiral Shane once the barrier went down. The fighters finish the alien ship off and Alex and his crew become heroes. At a later ceremony, Alex accepts his brother's Navy Cross and his own Silver Star and has been promoted to Lieutenant Commander. Alex finally asks Admiral Shane to marry his daughter, but the Admiral refuses but asks Alex to come talk to him about it over lunch.

(From The Battleship Wiki)