Spirits

Ghosts
Ghosts are the remains of a deceased bug given visible form. They are only visible in-game after acquiring the Dream Nail. Ghosts can be consumed by hitting them with the Dream Nail to acquire 1 Essence; however, this does not count towards completion and the Essence is not necessary to fully awaken the Dream Nail.

Gravedigger
by Jonathan Lindblom

Location: Dirtmouth

Blue Child Joni
by Joni Kunelius

Location: Joni's Repose

The Traitor's Child
by N/A

Location: Queen's Gardens

Revek
by Revek

Location: Spirit's Glade

Upon entering the Glade, Revek warns the Knight that they will face consequences if they harm any of the Glade's "inhabitants".

Once Dream Nailing at least one ghost, Revek spawns and charges at the player, dealing 2 masks of damage. He cannot be damaged or defeated, but can be repelled by parrying, Dream Nailing or hitting him with the trail of the Crystal Heart's Super Dash. Doing so will despawn him only temporarily; he will keep appearing and attacking as long as there are ghosts in the Glade. Exiting the Glade will reset him and he will stand on his tomb again like all other spirits until an another ghost is Dream Nailed. Once all ghosts have been consumed, he himself can be Dream Nailed.

Millybug
by Makoto Koji

Location: Spirit's Glade

Caspian
by Quatropus

Location: Spirit's Glade

Dr Chagax
by Manoel Pereira de Queiroz

Location: Spirit's Glade

Atra
by Jonathan Cowie

Location: Spirit's Glade

Garro
by Jose Angel Lara

Location: Spirit's Glade

Kcin
by Nick

Location: Spirit's Glade

Ghorac
by George Ghorac

Location: Spirit's Glade

Hundred Nail Warrior
by John Nugent

Location: Spirit's Glade

Karina
by Karina Weber

Location: Spirit's Glade

Perpetos Noo
by Perpetual Noob

Location: Spirit's Glade

Molten
by Drew Jason Cossa

Location: Spirit's Glade

Magnus Strong
by Jason DeGraw

Location: Spirit's Glade

Waldie
by David Waldie

Location: Spirit's Glade

Wayner
by Jeff Brooks

Location: Spirit's Glade

Wyatt
by Jack Ercid

Location: Spirit's Glade

Hex
by B. B. Williams

Location: Spirit's Glade

Thistlewind
by Sasha Trampe

Location: Spirit's Glade

Boss
by Will James

Location: Spirit's Glade

Poggy Thorax
by Josh Clark

Location: Pleasure House, City of Tears

Marissa
by Marissa "Blondie" Brice

Location: Pleasure House, City of Tears

Hive Queen Vespa
by N/A

Location: The Hive

Caelif & Fera
by Juan Eduardo Pena

Location: Queen's Gardens

Cloth
by Noah Sturtridge

Location: Queen's Gardens

Trivia

 * Ghosts were a reward tier in Team Cherry's Kickstarter campaign for AU$ 150:

"Ancient Wanderer: Appear in-game as a bug spirit in the Glade of Hope! Help create the appareance and dialogue for your spirit counterpart: Tell of a previous life, aid the Hollow Knight on his quest, or taunt him as he passes by."
 * It is unknown exactly what ghosts are in Hallownest. They do not seem to have knowledge of the passage of time or even their own deaths, nor are they able to move from where their corpses presumably are. Considering they give Essence, which is made of dreams, it could be that they are simply imprints of the deceased bug's memories, rather than the actual spirit or consciousness of said bug.
 * If the player happens to be wearing the Defender's Crest while in Poggy Thorax's secret room, a bunch of hungry flies will swarm around them.
 * If the Player has followed Cloth's side quest, she will show up in Queen's Gardens to help the Knight fight Traitor Lord. The fight will end with Cloth and the Lord's demise, and Cloth's ghost can be seen and spoken to upon leaving and re-entering the room where the fight took place.

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