Rhodey

Rhodey (legal name: James Rupert Rhodes), otherwise known as his persona of War Machine, is the best friend and honorary brother of Tony Stark, the boyfriend of Pepper Potts, and the father of Riri Rhodes. He is currently a sergeant in the United States Air Force.
Rhodey became best friends with Tony after the two of them became roommates at the Massachusetts Institute of Technology. He is extremely protective of him, and was initially disapproving of Tony's betrothal to Bruce Wayne. He did eventually come to approve of Bruce, however, although he is still slightly wary of him to this day. This is also why he is extremely wary of Bucky Barnes, who came to stay with the family in February 2002.
Because of his military career, Rhodey's time with the Stark-Wayne Family was, in the past, usually limited to only a certain number of visits a year. Despite this, he became the honorary uncle of the Stark-Wayne children: Dick Grayson, Jason Todd, Lili Wayne, Harley Stark, Peter Stark, Bea Wayne, and twins Edward Wayne and Gemma Wayne.
Rhodey does have a family of his own: in December of 2002, he and Pepper Potts entered a committed relationship. They decided that they wanted to have a family around the time of their second anniversary, however, their experience with infertility meant that it was not until July 2nd, 2007, that their daughter Georgia 'Riri' Antonia Rhodes was born, not even two months after the births of Edward and Gem.
In the summer of 2008, after Tony built his first suits and became Iron Man, Tony built Rhodey his first War Machine suit. Rhodey then fought with Tony against Ivan Vanko during his drone attack on Los Angeles (and the Stark-Wayne family) on August 1st, 2008. This culminated in Vanko's death, and Rhodey's first appearance as his persona, despite the risk that this could've caused to his military career. But, thanks to the help of SHIELD, this had little effect on his career after all, as he was able to resume it with little action taken against him afterwards.