Green Lantern (John Stewart)

John Stewart, also known as the Green Lantern, is one of the major characters from the DC Comics.

Formerly an architect, social activist, and U.S. Marine sniper, John Stewart was selected by the Guardians of the Universe to be one of the Green Lanterns for Sector 2814. His distinguished service in the Corps has resulted in a place among the Oan Honor Guard and the position of chief trainer for new Lantern recruits.

Personality
John Stewart is at heart a professional soldier, a man of duty. He takes his roles as a protector of Earth, a member of the Green Lantern Corps, and a founding member of the Justice League with the utmost seriousness. At times this has led him into conflict with comrades like the Flash or Supergirl, who do not appear to share this serious attitude, his personality reflects in his military upbringing even in his personal life. His home, haircut, personal effects are all no frills and strictly utilitarian. His sense of responsibility is beyond reproach, as seen during his trial in the Ajuris System; John believes that beings entrusted with great power must be held accountable for their actions, including himself.

Power Ring
John is a wielder of a Green Lantern Power Ring, which enables him to construct anything out of light based on his imagination and willpower. The ring possesses a wide array of functions such as: translating alien languages, flight, the ability to breath in space, illusion casting, enhanced strength and durability, etc.

Stewart is known as the "Master Builder" of the Green Lantern Corps, primarily because of his architectural background. Due to his military training, one of his favorite (and most famous) constructs is a sniper rifle. He can be often seen picking off opponents from a far.

Skills
Stewart is a trained United States Marine. He is a skilled tactician and hand-to-hand combat, with expertise in various different types of firearms. His specialty is in long range weapons.

Trivia

 * Introducing himself to Hal for the first time, John claims his friends call him, "Square" John, before joking about calling him "Black Lantern."
 * In an unusual move for a Green Lantern, John Stewart does not wear a domino mask to protect his true identity. He made this perfectly clear at the start of his training by Hal Jordan when he tossed the mask away and declared "This black man lets it all hang out! I've got nothing to hide!"
 * Stewart's constructs are amongst the most powerful. As noted by many, Stewart's constructs are never hollow. He builds them from the inside out, down to the last nut and bolt.