Originally Posted by
Sharpandpointies
One of the things about the Ring is its subtlety. The business where Sam figures out the Ring is basically trying to manipulate him, that's one case in an entire series of 'that's not how it works'.
It gets one through the things that one wants, not by beating one over the head with a telepathically controlling sledgehammer, if that makes sense. ^_^
Also, there's no 'guiding intelligence' behind the Ring. It doesn't think, it doesn't have to figure things out about people. It just does its thing. Gruntle has issues. Especially when it comes to wreaking hell on people he figures are doing nasty crap, or who have hurt people for whom he cares. He also has issues about protecting the people about whom he cares. That's where the Ring gets him, especially because he doesn't have any specific resistance.
The Ring doesn't really give a 'in return for' -- no deals made, nothing like that. It's just...you know, in this situation it would be REALLY handy for him to use it, and whoa, look, it happened to get on his finger, and it WAS really useful and yeah, he'll never use it again because he knows full well what it is and how bad it is, nosirree...
...but you know, the next time Stonny gets in serious trouble, he might just reach for it because hey, it's Stonny and Gruntle will 'take the chance'.
Just to note: I'd not be too sanguine about Trull's chances, either. And I freaking adore Trull, as you know. But setting any bias aside....
1. Trull doesn't have any demonstrated resistance against mental stuff;
2. He's certainly not more powerful than Sauron, though Sauron would do well not to get within spear's reach of him;
3. Trull, for all of his self-sacrifice, has wants, desires, and occasionally explodes into a fury when he's driven to the edge of his ability to cope with the evil crap people do.
Trull's going to last longer, of course, than someone with a headful of selfishness or the like, but I don't feel he's the kind of guy who can sit with the Ring and just ignore it completely.