Anyone know about Malachi?

I’ve got a dear friend of mine looking to find more information about Malachi. He says he knows he’s an angel that came down to earth to live as a human, but past that, he’s clueless.

Any help?

Malachi? You mean the profet from the Bible?

I believe so. I’ve only heard of him like that, but I’m not sure if there’s anything else to him. But there isn’t a lot about him anywhere where I can dig at.