Here’s a strange one: The profile of Holy Ghost, a demon that only appeared in SMT if…, is contained in the data of Devil Survivor 2, along with Beldr, Jezebel, Belberith, and Samael, according to the Cutting Room Floor. Holy Ghost’s:
Angelic entities without names.
It is said that many are souls that never saw life. As innocent souls, they are allowed to become angels.
As Holy Ghost is a level 9 demon of the Divines in if…, this profile makes sense. It’s a really weird design for the Holy Spirit of the Trinity, but that doesn’t seem to be the intention after all (despite what some ancillary sources say). It’s basically a slime for angels.
Would it have made an appearance in Devil Survivor 2: Break Record? Who knows, since that game is about as ethereal as Holy Ghost itself.