I mentioned 'in all innocence' what turned out to be a very painful topic for her. [=I mentioned the topic without knowing that it was so painful for her to talk about it]
Your 'innocence' [=(more commonly) 'ignorance'] of the rules is no excuse for such behavior.
The defendant maintained/protested his 'innocence'. [=he said that he was not guilty]
(..) Have you seen? Children, little children, burned! I tried to make peace with Cersei. She used their innocence as a weapon against me. She thought it would cripple me. And Tyrion? He conspired behind my back (..)2019 TvShow: Game of Thrones Title: The Iron Throne Season: 8 Episode 6