Earlier quoted context omitted.
Thanks for bringing back to my mind where I snatched this one up! Yep, it's Ender's Game. :) What is the meaning of the Chinese (?) symbol?
It's a Japanese sentence ending, used to seek agreement/confirmation. Similar to "right?" or "isn't it?" in English.
(I've just started learning Mandarin, and enjoy looking at the origin of words and characters.)
"Innit" is slang in Britain, used at the end of a sentence. It doesn't have to mean "isn't it", but could be "aren't you", "won't you" etc.