[If he minds the petting, he doesn't say as much-too busy with his own thoughts to even notice it, possibly.]

Zat...zat is the short version of it, yes. Most anunnaki are benevolent, but zat one is...not, to put it simply.

Ant it has been locked away for a long, long time, ant has no way of escaping wisout help.

[And surely, no one in their right mind would want to help that thing escape.]