Rose’s letter from May 15, 1944 wasn’t the first one she wrote, but it is the first one we have and was probably the first one he kept, for reasons that will soon become apparent.
If Elmer’s letters are effusive and sometimes lusty, Rose’s were coy and self-deprecating. She had a dry wit and a tendency to tease (“Please pardon the scratching out, I am lounging on the bunk in The Hatch and I am getting very lazy,” she wrote, possibly in reference to their earlier jokes about Elmer’s long hernia recovery), yet her letters are carpeted with a soft sincerity. She responded to Elmer’s queries about not having received any letters from her by telling him that she did, in fact, write him; that the mails were slow; and that she would “go see my friend the Admiral and give him a piece of my mind and yours too if you want me.”

They traded news about their promotions. Rose told Elmer “how wonderful you are getting your first class stripe,” and then announced that she herself received a higher rating at the Navy Department. She wrote about life with her best friend and roommate, Anne, and told him that with all the food preparation she had been doing that she was “getting to be a wonderful cook, if I do say so myself. I baked an apple pie the other day and it’s all gone. I also baked a ham and I fried a chicken all by myself. I hope I am not making you hungry.” She also passed along the news that her brother Danny had joined the Navy (“because of me, he says. Isn’t that sweet of him?”), and apologized for only having pictures of cherry blossoms in DC on account of her not having her own camera (though she further chided him, “Don’t you know there is a war going on and film is very, very scarce.”)
But the highlight of the letter came on page three, which . . . well, maybe it would be better to read it yourself:

Right afterwards she used the poem to segue into a difficult subject: “Did you like it? I hope so because I have a confession to make. I lost the heart off of [the bracelet that you gave me].” She explained how it got lost, and then added, “I am trying to get one like it and I won’t rest until I do. Am I forgiven? I hope so.”
She concludes by telling him that Anne asked to tell him, “hello, be a good boy, and come home safely.” Rose then added, “She usually isn’t that sloppy but I have to humor her since her operation.” She signed off, “Love and things, Rose,” followed by a row of X’s.
I don’t really have a hard-hitting historical analysis for this letter. To be perfectly honest, it just makes me wish that I could have had the opportunity to meet her.