You decided to start from the top and go down, so you leaned close to one of Rouge's ears and peered in. Already, you could see a faint glimmer from one of the gems she had in there. "I'm... not going to unbalance your head, am I? Or damage your hearing?"
The bat-thief just laughed at that. "Kiddo, if that hasn't happened from all the hard, sharp gemstones I've put in there, there's no chance your softer body will be able to hinder it. You'll be fine."
"Even if I end up in your brain?"
"Even then!"
"Alright." With that reassurance, you began pushing first your hands into Rouge's ear, surprised when your body compressed in the process, similar to when you were in her pussy. When you climbed all the way in, you were relatively about half the size of the roomy hearing organ, without the help of your magic. _{"Wow... How is this happening? Are some of the gemstones you stored dimension-altering?"}
"Probably, I've placed a lot in there," she noted as she got off her bed, roaming through the house. "And don't worry about speaking loudly in there, kiddo, it'll be fine."
"O-okay..."

And so, you got to work, walking around in Rouge's ear, trying not to look outside—the motion of Rouge's head, unfelt by you, would likely make you some variant of nauseous. Luckily, you didn't need to do so as you checked every nook and cranny, digging some out of what little earwax there was and pushing them to the exit. Rouge could feel every single gem you pushed, and without fail held her hand out to catch it no matter what she was doing, soon building up a sizable pile in her bedroom once it was all done. Now you just had to go deeper in, and get the ones knocking about in her cranial cavity... Were you up to doing that now? Or too wary, and would prefer to go somewhere else first? There's the nearby eustachian tube if you want to jump track to check her digestive system...