I've been wondering, it's the Four Devas but who the hell is the fourth Deva?

AsashiInari said:

I've been wondering, it's the Four Devas but who the hell is the fourth Deva?

That's for ZUN to know and for us to find out maybe years later.

Unknown. Only three of the four have been named in canon, and Ibaraki was only relatively recently confirmed to be an oni.

hemlock said:

Unknown. Only three of the four have been named in canon, and Ibaraki was only relatively recently confirmed to be an oni.

Recently "confirmed", but literally everyone already knew she was one, no matter how hard people wanted to insist you couldn't be sure until it was "proven"

Her name and missing arm alone were enough proof the moment she appeared, plus various other hints.

AsashiInari said:

I've been wondering, it's the Four Devas but who the hell is the fourth Deva?

Its Konggara;She lives in the blazing hell with Sariel.
She just came to check on them but was amazed by their nature and decided to stay for a while with them.