Seems that what you are looking for is an explanation for
"How does it work against creatures which are neutral"
Let us start by considering the rules:
Quote:
Glimpse of Redemption Reaction
Champion
Source Core Rulebook pg. 107
Trigger An enemy damages your ally, and both are within 15 feet of you.
Your foe hesitates under the weight of sin as visions of redemption play in their mind’s eye. The foe must choose one of the following options:
The ally is unharmed by the triggering damage.
The ally gains resistance to all damage against the triggering damage equal to 2 + your level. After the damaging effect is applied, the enemy becomes enfeebled 2 until the end of its next turn.
Glimpse of redempion doesn’t have any trait, so it is meant to work on anything.
-Mindless creatures with immunity to mental
-Neutral creatures
-Swarms
-Etc...
As for neutral creatures, it is the Redeemer which sets what is good or not, as a druid decides what harm nature or not.
If a hungry Lion attacks a friend of you, you will simply use your reaction to hold him back.
Remember that this is the same as thinking of mindless undeads. They just wander and kill, as any other predator.
And in this specific case, we have a dedicated oath for the champion. Which indirectly means that it is obvious that the reaction would work on unwilling creatures, or creatures with no will.
You could simply consider it like "they find themselves facing a a primordial fear, which could or not hold em"
In a more pratica way, the enemy target decides if he wants to get enfeebled 2 for the next round and have his dmg reduced, or simply forgo his dmg.
It is just a reaction.
Nothing else.
Stick too much with roleplay and interpretation, when rules are clear, just leave an opening for a homebrew rule.
