The Holy Spirit is not referenced by many of the names used elsewhere in the NT. The expression “the seven spirits of God” used in the opening chapters (1:4; 3:1; 4:5; 5:6) may refer to Zechariah’s prophecy (4:2, 10) and refers to God’s seeing in all the earth (4:5) and to Christ’s ruling in his church (3:1). Elsewhere, the Holy Spirit is referred to simply as “the Spirit” and it is in the Spirit that John receives his visions. The Spirit, with Christ, also calls the readers of the book to drink of the water of life (22:17) and encourages the church and the prophets to speak the testimony of God (19:10).
This evidence demonstrates that in Revelation, the Holy Spirit is sent by the Father and the Son to see all things in the earth and to inspire revelation and proclamation by God’s servants.