Look, we all know Pepper Potts is Tony Stark's right-hand lady in the MCU, but that doesn't mean she's his only confidante. Let's not forget his children...I mean robots. Mainly, Dum-E, because his name alone shows just how underappreciated he is.
First of all, when Tony returned from his time in captivity and had no one, Dum-E was there to help him put together the Mark II, which is basically the Iron Man suit we've all come to know and love. Yeah, yeah, Tony's the genius but what would he be without Dum-E there in case of emergency?
Dum-E is not only there to clean up Tony's messes but clearly has his own personality as well. And while Tony can charm his way out of many situations, Dum-E does not care about Tony's wealth or ridiculous actions. He treats Tony like the demanding father he is. AND HAVE I MENTIONED THAT DUM-E SAVED TONY'S LIFE?! In Iron Man, Tony is just lying on the floor without his arc reactor (i.e. his freaking heart) when Dum-E very casually hands him his old one that was just out of reach, thus saving his life.
In Iron Man 2, Tony is (once again) dying and in order to slow the palladium poisoning in his blood must drink chloroform all day. Of course, Dum-E was the one to make the life-saving drinks because HE JUST WANTS HIS FATHER'S APPROVAL.
At the end of Iron Man 3, Tony's entire mansion is destroyed, including his beloved Dum-E. But dry those tears because Tony rescues the parts of Dum-E in order to put him back together. And by Spider-Man: Homecoming, Dum-E is back to almost breaking things while Tony yells at him.
Tony Stark may not have kids (yet) but he still gets to be an unreasonable father to Dum-E. Cue the "awwwws."