Our Angels Are Different: Specifically, a fiery Cherub.

It's almost undoubtedly Jophiel, see Our Angels Are Different below.

No Name Given: Actually averted by implication.

In addition, its actions during the battle at SCP-1730 suggests that it will violently attack any being that threatens to cause a masquerade breach.

It will also forcibly order anyone approaching it to turn back instead of destroying them, either because it thinks they are Not Worth Killing or out of genuine desire to preserve their lives.

Its 'rescue' of the survivors in SCP-1730 could be interpreted as genuine concern for their safety, unless the Guardian simply wanted a good fight. It also violently terminated the researchers who killed a D-Class who refused to turn back.

Light Is Good: Depends on interpretation, but it could lean more toward good due to how it prompted the Founder to create the Foundation and contain so many dangerous entities and anomalies.

'Instant Death' Radius: Any entity that gets within a 1km radius of it will be immediately struck by its Flaming Sword and instantly obliterated from existence.

Garden of Eden: What it seems to be protecting.

Flaming Sword: Has a sword which produces flames that are not only hotter than the Sun, but can completely remove whatever it hits from existence.

SCP-001 immediately destroyed the research staff conducting the experiment.

After the Foundation ordered him to resume the experiment and he continued to disobey, the Foundation terminated him. Everyone Has Standards: The Foundation sent a D-Class to approach it, and it commanded the D-Class to leave.The Dreaded: When an entity is so powerful that even Able refuses to fight it, you know it counts as this trope.Deader Than Dead: Anything approaching within 1km of it is effectively annihilated.Supposedly, it gave The Founder the order 'Prepare,' which he claimed formed the impetus for creating the SCP Foundation. The most common is 'Forget,' which results in the person walking away with no memory of the encounter. Compelling Voice: Issues commands to those who come too close.Big Damn Heroes: In SCP-1730, it flies in to clash with the giant black worm monster and SCP-2845, giving the survivors more time to run.Attack of the 50-Foot Whatever: It's 700 cubits tall, that's 1,050 feet (or 320 meters).Angelic Abomination: A vastly powerful flaming angel that can destroy anything near it.

Scp containment breach mouse jerk