So, in real life, are you also ready to put on a parachute and jump into the mouth of an erupting volcano? After all, a parachute protects against falling, what's there to be afraid of, and if it doesn't protect, then it's a bad parachute.
And if we're talking about complete immunity, which is what I'm talking about, then it doesn't exist. Something that would force the Rinzei to either kill the character or take them into ordinary slavery (I don't consider being a freak for immunity). At least, something like Moen, which has proven its effectiveness. And again, I highly doubt that Moen will save you if an NPC, having caught such a character, wants to cut off his tongue for having too long a tongue. But in that case, there would be no complaints about him, it's clear why he doesn't save here.
Небо – угроз не слышит
Небо – ведёт особый счёт
Небо – тебя найдёт