The Great Old One
For eons, the Great Old One slumbered. Deep beneath the seas, in a prison folded from space and time. It was supposed to hold for eternity. But there were those who knew of it. Encompassed by a blissful madness, they worked for centuries to see its release. Arcane rituals were written and performed, failing time and again. Until, finally, one succeeded. In the dark heart of a nameless forest, the madness finally yielded fruit.
The world shook as the Old One awoke. Psychics and magi everywhere felt its presence, filling their minds with visions, whether awake or asleep. Humanity trembled.
The thing is, though, it turned out to not really be that bad of a guy. Sure, there was the tsunami when it arose from the depths. It was really apologetic about that, though, and convinced a lot of its cultists to start up charities to help with rebuilding the coasts.
Of course, the various world governments were very unhappy. There was this enormous being, ripped from humanity's nightmares of the times before sapience, showing up with an entirely new piece of real estate in the middle of the Pacific. Only a few of them showed up when it invited them over for a visit. Even those brought a whole lot of unnecessary military escort.
It has messed up a few times. I mean, it's got the entirety of civilization to catch up on, so it should be forgiven a few faux pas. To its credit, there was no human sacrifice, no bloodletting, and very little injury. It seems to love hugs, but has a lot to learn about human structural integrity.
Here we are, a few years later, and people are starting to get used to our new neighbor. There's still all kinds of scare media out there talking about its “unfathomable, alien mind” and its “undoubtable hatred for our species”, but they really don't have much to go on these days. It didn't really seem to care when North Korea launched a nuke at it. Just batted it out of the air and went on with its knitting.
I'm really looking forward to seeing that scarf when it's done.