Secret Identities

As a part of having an alter ego, individuals try to keep secret identities, often telling as few people as possible about their alternate identity. Below are lists of characters' secret identities, and who is aware of them.

Obadiah Stane/Iron Monger
After the death of Howard Stark, Obadiah Stane became the new CEO of Stark Industries but Tony Stark then returned. Leaving Obadiah with serious jealousy. He attempted to get Tony assassinated and when that failed he recreated a better version of the Iron Man suit that Tony used to escape captivity, rebranding himself as Iron Monger.
 * 1) Pepper Potts: Pepper found out what Obadiah was planning when she had to pick up some files for Tony Stark.
 * 2) Tony Stark: Obadiah revealed his plans to Tony when he attacked him to get the Arc Reactor and left Tony to die.
 * 3) Phil Coulson: Pepper Potts informed Phil about Obadiah's plans.
 * 4) James Rodes: Pepper Potts informed James about Obadiah's plans.

Bruce Banner/Hulk
After an experiment went wrong, Bruce Banner got injected with too much Gamma Radiation causing him to mutate and become the monster known as Hulk. Bruce, however, can't control the Hulk's actions.
 * 1) Thaddeus Ross: Thaddeus led the experiment that accidentally created the Hulk.
 * 2) Betty Ross: As the daughter of Thaddeus Ross and the, then, fiancée of Bruce, Betty was there when the accident happened that created the Hulk.
 * 3) Emil Blonsky: Emil was in the special-ops team hunting down Bruce. While he was hunting him down, Bruce transformed into the Hulk to fight back. After the mission failed Thaddeus Ross informed Emil that the monster that stopped them was Bruce himself.
 * 4) Samuel Sterns: Bruce came to Samuel for a cure for his Hulk problem.
 * 5) Natasha Romanoff: Natasha was most likely informed of Bruce's identity as the Hulk by S.H.I.E.L.D. (off-screen).
 * 6) Nick Fury: Nick is aware of Bruce's identity as the Hulk; most likely due to the fact that he is the director of S.H.I.E.L.D. (off-screen).
 * 7) Tony Stark: Tony was informed of Bruce's identity as the Hulk by the file that he received from Phil Coulson.
 * 8) Steve Rogers: Steve was informed of Bruce's identity as the Hulk by the file that he received from Phil Coulson.
 * 9) Loki Laufeyson: Loki is aware of Bruce's identity as the Hulk.
 * 10) Thor Odinson: Thor was informed of Bruce's identity as the Hulk; due to them both being members of the Avengers.

Emil Blonsky/Abomination
When Emil Blonsky was tasked to take down Hulk, he needed some more power. He received some of this power through the old Super Soldier Serum but then became obsessed with it. He later forced Samuel Sterns to inject him with radiated blood from Bruce Banner, but this was too much power, causing him to become Abomination.
 * 1) Samuel Sterns: Samuel was the one who injected Emil with Bruce Banner's blood and he saw Emil transform into Abomination.
 * 2) Thaddeus Ross: Thaddeus quickly realized when he saw Abomination that that actually was Emil.

Former secret identities
The following are individuals who once had secret identities, but later their identities became known to the public.

Tony Stark/Iron Man
After Tony Stark was kidnapped by terrorists to create missiles for them, he escaped by making a suit. Because of this experience, Tony decided that he didn't want to manufacture weapons anymore and became the hero known as Iron Man. ➡️ At a press conference after the incident with Obadiah Stane, Tony revealed to the public that he is Iron Man.
 * 1) James Rhodes: When Tony was being attacked by the US Army because they thought he was an unknown weapon, Tony confessed to James that it was him inside the suit.
 * 2) Pepper Potts: Pepper walked in on Tony when he couldn't get off his suit.
 * 3) Raza Al-Wazar: Raza was aware that Tony had updated his old suit from in the cave into a newer version.
 * 4) Obadiah Stane: Raza told Obadiah about how Tony made a suit in the cave and he also told him that Tony upgraded it after his escape.
 * 5) Phil Coulson: Phil was informed about Tony's identity as Iron Man seeing that he provided Tony with an alibi after the incident with Obadiah Stane.

Natasha Romanoff/Natalie Rushman/Black Widow
Natasha Romanoff is an agent of S.H.I.E.L.D., under the codename of Black Widow, who was ordered to shadow Tony Stark as an assistant named Natalie Rushman after S.H.I.E.L.D. found out that Tony was dying. ➡️ Following the battle of New York, Natasha and the rest of the Avengers appeared on multiple forms of media making her face and identity known to the public.
 * 1) Nick Fury: Nick is aware of Natasha's identity since he is the director of S.H.I.E.L.D. and sends her on her missions.
 * 2) Tony Stark: Tony found out about her identity when Nick Fury revealed who she really was when he and Tony were meeting at a donut shop.
 * 3) Happy Hogan: Happy saw Natasha in action in her S.H.I.E.L.D. uniform when they were breaking into a Hammer Industries facility to take down Ivan Vanko.
 * 4) Georgi Luchkov: Georgi realized that Natasha was spying on him, also realizing that after she gave him outdated information that she is the famous Black Widow.
 * 5) Phil Coulson: Phil is aware of Natasha's identity since he works for S.H.I.E.L.D.
 * 6) Bruce Banner: Natasha informed Bruce about her being an agent of S.H.I.E.L.D. when she went to recruit him for the Avengers.
 * 7) Steve Rogers: Steve met Natasha in her S.H.I.E.L.D. uniform.
 * 8) Thor Odinson: Thor met Natasha in her S.H.I.E.L.D. uniform.
 * 9) Loki Laufeyson: Loki met Natasha in her S.H.I.E.L.D. uniform.
 * 10) Clint Barton: Clint is aware of Natasha's identity since he is the one who recruited her to S.H.I.E.L.D. when he was sent on a mission to kill her.

Clint Barton/Hawkeye
Clint Barton is an agent of S.H.I.E.L.D., with the codename Hawkeye, known to mostly fight with his bow. ➡️ Following the battle of New York, Clint and the rest of the Avengers appeared on multiple forms of media making his face and identity known to the public.
 * 1) Nick Fury: Nick is aware of Clint's identity since he is the director of S.H.I.E.L.D. and sends him on his missions.
 * 2) Erik Selvig: Erik is aware of Clint's identity since he works for S.H.I.E.L.D.
 * 3) Loki Laufeyson: Loki was informed by Clint himself when Clint was mind-controlled.
 * 4) Maria Hill: Maria is aware of Clint's identity since she works for S.H.I.E.L.D.
 * 5) Phil Coulson: Phil is aware of Clint's identity since he works for S.H.I.E.L.D.
 * 6) Natasha Romanoff: Natasha is aware of Clint's identity since he is the one who recruited her to S.H.I.E.L.D. when he was sent on a mission to kill her.
 * 7) Steve Rogers: Steve was informed of Clint's identity as Hawkeye; due to them both being members of the Avengers.
 * 8) Tony Stark: Tony was informed of Clint's identity as Hawkeye; due to them both being members of the Avengers.
 * 9) Thor Odinson: Thor was informed of Clint's identity as Hawkeye; due to them both being members of the Avengers.
 * 10) Bruce Banner: Bruce was informed of Clint's identity as Hawkeye; due to them both being members of the Avengers.