Here is just a quick guide to how the one-shots will work concerning your character!

Steve:
Y/N L/N
Normal human
Incredibly smart
Mother and father deceased

Tony:
Y/N L/N
Ability to harness anyone else's power
Mother passed on while giving birth

Clint:
Y/N Rogers (Siblings)
Underwent the serum with Steve
Was found frozen with Steve
Mother and father deceased

Bruce:
Y/N L/N
Normal human
Has an ability to the right things to say at the right times

Pietro:
Y/N Romanoff (Sibling)
Went through the Red Room
Ability to see events that happen between 5 to 10 minuets in the future
Trained assassin

Thor:
Y/N Banner (Siblings)
Was with Bruce when exposed to gammer radiation but does not turn like Bruce
Is incredibly strong and quite hotheaded
Mother murdered by their father
Both abused by father

Bucky:
Y/N Odinsdatter (Thor's twin)
Goddess of healing and good health
Father is Odin and mother is Gaea

Peter:
Y/N Stark (Offspring)
Inherited fathers smarts
Skilled fighter
Mother is Virginia "Pepper" Potts

Loki:
Y/N Barton (Siblings)
Skilled with bow and arrow
Can shoot up to 100 miles away

Natasha:
Y/N L/N
The only one Romanoff remembers from the Red Room
Trained assassin
Better fighter than half of the Red Room combined
Mother and father unknown

Wanda:
Y/N Barnes (Adoptive relationship)
Tortured by Hydra as a small child
Barnes promised to help her
Can manipulate dreams and find hidden meanings within them