Based on what’s been revealed, it’s clear that Mason is an integral character to the overall narrative arc of Black Widow. Due to the absence of Fagbenle’s character in the film’s marketing, many fans have been speculating that Mason may end up being Taskmaster, but these newly-revealed tidbits could prove otherw
Based on the recently-released Marvel Studios’ Black Widow: The Official Movie Special Book, O.T. Fagbenle, who plays Mason in the MCU film, revealed that his character “can find anything you need” while also teasing his romantic relationship with Scarlett Johansson’s Natasha Romanoff.
Mason is a finder for people who aren’t so affiliated with armies, like people who are part of the underworld. He can find anything you need as well. He’s had a relationship doing that work for the Black Widow, and they have a bit of a vibe going on. There’s a sense that there’s more to their relationship than it being purely work-related, so that’s always in the mix.
Fagbenle’s description of Mason as a “finder for people” seemingly confirms that he has strong connections to powerful people while also having access to a vast array of resources. Given that, it isn’t surprising that Romanoff will ask him for help, especially after the heroine’s post-Civil War predicament by the time the film starts.