Pit

Nick is super trustworthy. His seven year old self has proven more trustworthy than some adults.
"If it turns out to be intelligent, I, or rather the Union, would have every right. Keeping a sapient being trapped is practically slavery. It's cruel if nothing else. Which is why it needs looking in to. And either way it's messed up to lock it down there if it doesn't want to be. "

Unless of course it does kill people and is dangerous, in which case it needs careful consideration and/or blasting.