Sorry if the question is confusing. Didn't know how to phrase it 100% right. Basically, I wanna write in my novel something like:
He had a thick accent on his Hs.
How do I write that? That the character has a thick accent on the letter H. Should I write 'H's, 'Hs', Hs, Hs, or something different? And please don't change the format of the sentence, nor turn the "H" into singular.