Within the MCU, you would have a hard time finding a character more powerful than Vision. Born from a multitude of sources, he was introduced in Age of Ultron (2015) and has since reappeared in the first of the Disney+ MCU shows, Wandavision. One of the best ways to understand Vision is to piece apart where he came from, and how all of that makes him much more than just an android. All of these parts to this powerful, yet emotional, character come together to make someone just as complicated as a human.
The thing about grief over losing a loved one is, that it is both a very individual experience, and also at the same time, universal. Most people are familiar with what it means to see someone pass that they cared about, particularly parents. The MCU takes several avenues to explore what losing a father can be like, with those universal themes still easy to grab onto, even among gods and super geniuses.
Fans of the movie Die Hard have long bemoaned the exclusion of this film among the Christmas Films. After all, how could a movie set during Christmas not be considered to be one of the greats? Many families still stubbornly surround the TV each holiday season to see John McClane kick ass, but this year this author offers a nice slice of Marvel alternative: Iron Man 3. Not only does this not-as-appreciated part of the MCU occur during Christmas, but it also holds many similar themes to that of our favorite classics.