No incarnation of Voldemort is actually stupid enough to try to do more that hold this off as he Apparates away -

And Fay dives through her own flames - they can kill even their caster but she doesn't care she wants to rip his face off -

An extremely enraged tiger of flesh and blood and vicious fire collides with the Diadem's body, latching on.

ABORT MISSION.

He slams an Apparition through - his body will splinch but that doesn't matter, he'll take a new one -

Fay spins through with him, leaving her Fiendfyre raging in its tight confines behind her -

- And there's a couple seconds, at least, where both are gone. The Fiendfyre seems diminished, pulled into Fay's Apparition, but it's not dismissed. 

It at least also isn't growing at all to eat everything around it. The remaining flickering tigers pace back and forth, agitated. 

Elodie starts throwing up wards in case that changes suddenly.

And Ellie whimpers on the ground.

And Fay whirls back. She's still cloaked in fire, a tarnished diadem clenched tightly in her jaws -

And the Fiendfyre whirls in toward her, ripping the diadem apart in a frenzy - black screaming smoke seems to be trying to pour from it and not getting very far before being ignited.

It disintegrates.

And the Fiendfyre fades out, and Fay whirls back to human form, flinging herself to fall to her knees beside Ellie.

Anathema had been trying to hold the fire back. 

She turns to kneel beside Ellie too.

"Ellie?" she asks, voice soft.

"Nnn. 'M here."

She casts a pain relief spell.

"He's dead. Let's get you home," she says, softly.

(She means their actual home. She doesn't want to expose Ellie to the Dementors even in passing right now.)

(She doesn't want to expose herself right now.)

"...Yeah. Sounds good."

She's - shaking too hard to side-along someone.

Anathema half picks up Ellie, supporting her as much as she needs - makes sure they have Ellie's wand -

And they can all Apparate to the edge of the property boundaries.

Ellie starts shaking afterwards.

She gets her into their room -

Just. Her, Ellie, Fay. No one else. Warm blankets and a lot of snuggles.

Fay has so many hugs for Ellie.

Yeah.

That was really just. Not fun. At all.

Slow, gentle kisses.

(It wasn't fun to watch. It must be worse experiencing it. (She does not say this out loud.))

And slow, gentle hair pets.

Gradually, she calms down.

Fay kisses the top of her head.

"Was almost worse than the Cruciatus."

"Voldemort is a dead man walking," she snarls.