The House of Lucifuge along with House of Gremory had served under Lucifer; one of the Four Satans that governed the underworld.
However, her house also was in servitude of House Gremory and she worked as a maid of sort.
As always, Lucifer's direct command superseded Sirzechs', and every able devil must participate in this all-out attack against the host of heavens.
Sirzechs flew after the woman he cared about with a smile.
"And leave you behind? I would never do such thing."
Grayfia was about to response, but a huge eruption occurred high in the sky.
The explosion expanded and enveloped the crowded mass of combatants.
Grayfia blinked as she was blinded temporary while her ear rang from the resulting shockwave.
Where there was thousands of devils and angels, now mostly empty space. That titanic explosion had devoured them instantly.
A small shadowy being was all that left from that explosion.
Grayfia narrowed her eyes, trying to make out the survivor.
She saw the half-destroyed form of Lucifer. His jet-black devil wings were shredded as he descended slowly towards the ground.
Without any further thoughts or hesitations, she flew to her Master to render any assistance.
Sirzechs, behind her, also saw this and followed closely after.
"Finally… he's dead," Lucifer announced loudly, and coughed out the blood that his throat was clogged with.
He and his three colleagues had managed to kill God, but they gave their lives doing so.
Lucifer felt that his wounds were fatal.
He was missing two limbs with two more badly mangled.
He knew he would expire soon under the crackling and distorted sky.
"Do you feel that?" Sirzechs asked as he caught up to Grayfia.
The surrounding air and the area were incredible dense with demonic and holy energies.
God was powerful, and so were the Four Satans.
Most of them were dead, and the last one would be joining them soon.
However, when their bodies were destroyed, the overwhelming powers that once inhibited their being were released into the air along with thousands of other, devils and angels alike.
Unholy and Holy residues clashed against each other, distorting the heaven above. It would remain so for some time.
"Lucifer-sama," Grayfia said as she caught her battered master in the air. She quickly touched down to the ground and let her Master into a comfortable position on her lap.
Lucifer looked up at her with a smile before pointing at Sirzechs.
As he was dying, he had thought much of what to do next.
The host of heavens had lost its head, but so did his own race with his death.
The Underworld would need someone to lead.
One must be selected, and powerful enough that all devils will have no choice but to acknowledge it.
His own children were not that successor. For a second, he thought of Grayfia might be possible due to her overwhelmingly powerful demonic ice magic, but unfortunately, the House of Lucifuge was not part of the 72 pillars.
The other devils would not accept her readily. Fortunately, another came along with her to his aid.