This is how Twilight releases Rarity, Rainbow Dash, and Princess Celestia's protoplasms goes in
[Twilight gallops to the vat]
Rarity: Twilight. Twilight. Twilight.
Twilight Sparkle: Rarity. I'll save you.
[Twilight lifts Rarity's soul from the vat]
Rarity: Oh, thanks Twilight. Oh, am I glad to see you. Now let me go so I can return to my body.
[Twilight lets Rarity's protoplasm go]
Rarity: I always knew you were a hero, Twilight.
[Rarity's demon-possessed body prepares to go inside the mansion]
[Rarity's soul heads toward her body]
[Rarity's soul re-enters her body and her neck glows green and a demon pops out of her body]
[The demon roars and prepares to attack when it grows pocks and explodes]
[As the demon disappears into nothingness, Rarity gets an idea]
[Twilight sees Rainbow Dash's soul and picks it up]
Rainbow Dash: Twilight can you tell me what happened?
Twilight Sparkle: Rainbow Dash. You're a protoplasmic head.
Rainbow Dash: I know. But I'm still the loyalist protoplasmic head here.
[Twilight lets go of Rainbow Dash's protoplasm]
[Rainbow Dash's soul screams while flying]
Rainbow Dash: How do you drive this thing?
Possessed Rainbow Dash: The ritual is about to be performed. Get everything you can for the ceremony.
Rainbow Dash: On your right. To the left.
[Rainbow Dash's protoplasm tries to re-enter her body]
[Then Rainbow Dash's protoplasm bumps into a door and goes bouncing around the room]
[Twilight lifts Princess Celestia's soul from the vat]
Princess Celestia: Put me back, Twilight. I'll figure a way out myself.
Twilight Sparkle: How are you going to do that?
Princess Celestia: Maybe if I can stretch my tongue, I might be able to get my body back.
[Twilight lets go of Celestia's protoplasm]
[Twilight sees the Daemon Ritus on the table]
[Rarity sees the shining suits of armor as she enters the mansion and sees a protoplasm and enters the mansion and sees the possessed Princess Celestia]
Rarity: Uh yo yo you yo.
[The possessed Princess Celestia walks to Rarity]
[Rarity shoves the possessed Princess Celestia over into a room]
Possessed Princess Celestia: You'll pay for th...
[The protoplasm enters Celestia's body and Celestia starts to move around]
[Rarity shuts the door and watches Celestia move around]
[Rarity gallops to the window]
[Princess Celestia's neck glows green and a demon pops out of her body]
[The demon growls at Princess Celestia and starts to attack her]
Rarity: You could use a little sunlight.
[Rarity opens the blindfolds and the demon screams as it explodes]