Naberius is named after the Marquis of hell, and Amduscia is likewise named after the demon King Amdusias, listed in the Goetia.

Lillipa is named after the Kingdom of Lilliput, and the lillipans are based on the lilliputians, from Gulliver's Travels.

Vopar is possibly named after the Vorpal Sword from the poem "Jabberwocky" in Lewis Carroll's "Through the Looking-Glass, and What Alice Found There", but given the abundance of water on the planet it could also be named after the aquatic demon Vepar.

Oracle seems be a Japanese phonetic anagram of Algol, similar to Ragol from Phantasy Star Online, but substituting a C in place of a G.