Answer:
that depends.
Step-by-step explanation:
If you are only using the capital letter, I'll use 'A' as an example, here is a sentence this would work; And as I was finishing up the letter to my love, I wrote "Love, Yours truly, 'A'.", and this is how you should always write a stand alone capital letter.(:
You're welcome!
-Theadosia, your friend from hell