Who he is: Spider-Man, a.k.a. Peter Parker
His power: He possesses—unsurprisingly—spider-like abilities. He can climb walls and has vastly increased strength and agility. His senses are so acute as to be at times overwhelming. In addition, he has developed wrist gadgets that shoot a web-like thread with the strength and stickiness of a spider’s.
His story: Thus far, we don’t have much information about Peter Parker. In Captain America: Civil War, we learn he’s an exceptionally gifted kid, as his Aunt May is nonplussed by the news he may have won a scholarship from Tony Stark for his designs. He gives Stark a brief explanation of his powers, and how he tries to use them for good. Stark convinces him to come with the remaining Avengers as they try to bring in Captain America and his team, but after getting slightly injured in the battle, Tony tells him to sit the rest out.
Played by: Tom Holland, and no one else. Those previous versions weren’t part of the MCU, see.
Currently, Spider-Man is: Back in New York with Aunt May, possibly in the middle of finals.
Where will we see him next? Spider-Man: Homecoming, due out July 7, 2017.