Some think the Spirit, or Holy Spirit, does not appear in the book of Revelation. You won 't find the words, "Holy Spirit," but The Spirit appears throughout the Revelation of Jesus! The Spirit appears complete as the perfect Seven Spirits. Are these Seven Spirits seen elsewhere in scripture? Have you ever thought of the Holy Spirit as seven Spirits combined?
Scriptures: Revelation 1:4, 22:17, 1:10, 4:2, 1:10, 4:2, 17:3, 21:10, Zechariah 4:1-14, 5:6, 3:12, Isaiah 11:2-3, Proverbs 15:3, Revelation 5:12,13, Revelation Chapters 4 and 5
Other Resources:
Video: thebibleproject.com - "Apocalyptic Literature"
Podcasts: thebibleproject.com - 8 episodes - "Apocalyptic Literature"
Article: apologetics press.org - "The Trinity" by Kyle Butt