Riri Williams/Ironheart (Marvel)

Ironheart, (Better known as Riri Williams) is the main protagonist of her new Ironheart and Invincible Ironman series. She later took on the mantle of Ironman in a very strange fashion.

Why She's Loathsome

 * 1) Her backstory is rather poorly written, apparently, Marvel attempted to give Riri a tragic backstory to give her more "depth" and more "character development".
 * 2) Like many of Marvel's more recent heroes, Riri's actions are sometimes more villainous instead of heroic. One time she literally stole materials from her school just to improve her Ironman suit.
 * 3) She didn't have a pleasant reason to become the new Iron Man.

Trivia

 * Riri Williams is apparently 15 years old in the comics.