u/RedNUGGETLORD

1: Axis Order - Konosuba(specifically Megumin's spin-off)

While they certainly aren't GOOD people(many of them not being allowed near children, if you know what I mean), they are pretty damn helpful, giving blessings to Megumin, feeding her, and protecting her from a demon, who almost certainly would have murdered her for the cat

2: Khan - Metro

While he is more spiritual than religious, I'd say it counts. Khan is a chill dude who is basically always right, and in the non-canon good ending, he's basically the reason the Dark Ones survive and presumably go on to join with humanity and reconquer the surface

3: Priestess - Goblin Slayer

She's a priestess, idk what exactly she believes in, besides some god, but Goblin Slayer is basically a DnD game, so I'd assume one of the basic Cleric gods. But anyway, she's super chill and basically never directly kills, though she probably has the highest indirect kill count in the series

4: Father Grigori - Half Life

He's certainly insane, but so would you be if your entire town was wiped out and turned into zombies, he saves you, gives you a shotgun, and helps you get out of town, while he stays to "tend with his flock", and while murder isn't something you'd usually associate with good, the zombies are in constant suffering

None of that "And then they became true allies", or stayed allies after the fact, no, just a temporary alliances, that quickly goes back into opponents once all is said and done

1: The Gravemind teaming up with you to take down Truth - Halo

The Flood aid the UNSC-Covenant Seperatist joint force in taking down The Covenant Loyalists, as the activation of the Halo array will destroy all life in the Galaxy, which is a net negative for everyone

Right after Truth is dead, The Flood immediately betray you, as they obviously would

2: The battle of Uan’voss - Warhammer 40k

While there are many examples, I thought this one was pretty cool. The Tau and Necrons teamed up to fight the Tyranids, while they didn't immediately fight afterwards, the Necrons are hostile to everyone, so technically, they are still fighting on other fronts  

3: Everyone fucking up Shara Ishvelda - Monster Hunter

You "kill" Ruiner Nergigante, then go on to fight Shara, after beating it, the creature suddenly gets back up, ready to begin round 3, only for Nergigante to reappear, kill Shara with zero difficulty, and leave. While it's not confirmed, I like to believe that he's meant to be the same one who saves you against Bezelgeuse, and also your first Ruiner Nergigante kill later on. But either way, I HEAVILY doubt this Nergigante went on to make peace with humans, even if he's probably intelligent enough to do so

1: Skar King - Monsterverse

He is a significantly reduced threat then the previous main villains, and while he wishes to rule the world, every other threat would have destroyed it(Muto's resetting the world, Ghidorah performing the rumbling, Mechagodzilla just killing everything he sees)

2: The Banished - Halo

The previous villain, the Covenant, were a massive galaxy spanning empire, while the Banished are basically just a bunch of pirates struggling against the skeleton crew of a single ship

3: The Swarm - Gears of War

The successor to the Locust Horde, they are SIGNIFICANTLY weaker. The Locust were able to wipe out 20% of humanity on the first day of their war, and basically NEVER lost until the very end, while the Swarm is struggling, and losing nearly every conflict, with a much weaker humanity who haven't even come close to how strong they were

4: Arc 4 - Re:Zero

In Arc 3, we had;

An Archbishop intent on reviving a witch who would destroy the world

A giant whale that can wipe out whole armies, that our protagonist needs to defeat to gain allies

Any time the main characters girlfriend died, a giant cat would try to destroy the world

The erasure of a major character

In Arc 4, we have;

Characters trapped in a place, and some monsters and assassins want to kill the main characters loved ones

1: Gloxinia killing Rou - Seven Deadly Sins

Gloxinia mistakenly believes that Rou killed Gerheade, so he goes insane and instantly kills him, before going on to join the Demon Clan, become a commandment, and commit numerous attrocities in their name, which includes murdering one of his good friends, Meliodas. While he does eventually learn his mistake and make ammends with his sister and Rou's reincarnation, it's pretty short lived, as the fairy king goes on to sacrifice himself for his successor

2: Eris leaves Rudeus - Mushoku Tensei

Eris has a massive inferiority complex, thinking that Rudy is way stronger than her, she's just in the way and needs to get stronger. So after having sex with him, she leaves a note with him and goes on a journey to get stronger so she can fight by his side

The problem is that she's REALLY bad with words, what did she write? "Sorry, we aren't a good match" or something to that effect, she assumed Rudy would be able to understand exactly what she meant because "he's a genius"

This leads to Rudy believing she left because he was THAT bad in bed, which is a bit comedic, until he becomes a shut in, barely eats and just sleeps for a few days, and when he goes to find his family, he's still depressed, and it all comes back when his next love interest, who very much resembles Eris in personality, makes fun of him for having erectile disfunction, after another misunderstanding, he tries to straight up kill himself. He gets better though, when his first best friend has sex with him, curing his ED, and was still there when he woke up the next day(which is a massive fear he has, that the girl would be gone the next day cause of what Eris did)

3: Gluttony Subaru killing EVERYONE - Gluttony What If, Re:Zero

In this official what if, instead of that final "I'll remember, I'll save you all" moment in season 4 ep 11, Subaru gives in to what his memory version of Meili says to him, to "Kill everyone and read their books of the dead", which would allow him to understand why everyone loves Natsuki Subaru(he has lost his memories, and everyone around him are talking about how great he is, all the deeds he's done and stuff)

Subaru goes on the kill EVERYONE who knows "Subaru", reading their books and inheriting all their memories, and even these hallucination of them that can help him, he gains white hair from reading Beatrices book, as it has her 400 years of isolation in it, and blinds himself in one eye from bashing his head against a bookshelf.

And what makes all this possible is Shaula, who anime onlies might not think is THAT strong because we haven't seen much, but she's straight up mudering characters as strong as Roswaal

Maki can hear and see Naoya

Maki can see curses without her glasses now

Toji can percieve curses with his five senses

Toji hearing and Replying to Kuchisake

I know this is a dead topic, but someone genuinely argued this with me today, so here you guys go

1: Sauron and Morgoth - Lord of the Rings;

Morgoth is basically a god, or super-angel, the strongest of his kind. Sauron was only his servant in the past, and never reached his masters level

2: The Covenant and The Flood - Halo;

The Flood were a universal threat, who were made up of literal gods who could manipulate reality, they wiped out the most powerful faction to ever exist, and there was an implication that the Flood weren't even using their full power. The Covenant rule some of the galaxy and can destroy planet, humanity was helpless against them and only won through plot and the Covenant being REALLY bad at tactics(to the point that Thel being somewhat competent made him the most dangerous Covenant Fleet Master in existence)

The Flood would wipe The Covenant out not even noticing they were at war(assuming the flood are at full power of course)

Gravemind - Halo;

>"Do not be afraid. I am peace; I am salvation."
"I am a timeless chorus. Join your voice with mine, and sing victory everlasting."

Baby - Five Nights at Freddy's;

>"There is nowhere to go... when we look like this. But if we looked like you, then we could hide. If we looked like you, then we would have somewhere to go. The scooper only hurts for a moment."

Conquest - Invincible;

>Hey. Hey. Don't give up, you can do this, You've still got a chance, you just need a little more...... Motivation

As he's holding down Mark while looking at a bunch of civilians

1: The Verdugo - Resident Evil

They would die for their master, and sacrifice their bodies for whatever mission he sends them on, in the remake, one of them is also his loyal butler who's served the family for a long time, which certainly explains the extreme loyalty in the monster, he probably doesn't even need to be mind controlled(rip, I killed him, totally wasn't worth the ammo, but it was fun)

2: Berserker(Heracles) - Fate

He is the servant of Illya, and protects her furiously, even treating her like she was his own daughter, pretty sure he even gets a power-up from her, showing just how close they are(it doesn't end up working out well, but hey, it was cool while it lasted)

3: Godzilla Jr. - Godzilla: The Series

He imprinted on Nick when he was a baby, and now protects him from any threat that comes their way, even at one point having to kill his own parent to defend Nick

4: The Arnold Terminator - Terminator

While he is of course humanoid, he isn't human, so he fits. Arnold was sent back in time to protect John Connor, twice, and managed to succeed