You forgot to add a story to the question... I would gladly help you tho ;)
Incorporate what? if you mean their selfs then i would say by giving a spice of them self or make their story have some character that relates to them, but then again the story itself is them already.
Answer:
is this letter supposed to contain stuff like date, address, etc
Explanation:
is this based on passage? if so please provide
Instead of “your” it should be “you’re”.