You float above the ground, staring at the spinning blood cocoon surrounding Emmett. It must be about six feet thick on average, and it's rotating at breakneck speeds. It's a solid defense, but it leaves her completely blind to anything going around outside. It has also taken all the blood off the ground, enabling you to stand without worry. You land. Time to figure out the best way to get through this defense before Emmett's eyes recover from your flash of light.
"Hey demon!" You yell out, testing to see if she can hear you. "Now do you under-"
"Fuck off!" She shouts.
Yeah, she can still hear you. Well, you have some time to gather energy. You start to focus light into the Longinus again. After a few seconds, the tip is shining a radiant gold. You pull your arm back and snap forward, hurtling the spear towards the bloodshield. You watch it penetrate the blood with a splash. The spinning slows over a few moments, then stops altogether. Then, all at once the blood falls to the ground in a giant wave. You manage to leap over it as it rushes out, no longer controlled by Emmett.
Speaking of, you quickly look to see where she is. She's standing on the ground, staring down in disbelief at Longinus piercing through her stomach.
"Y-you," she says hatefully, looking up at you, blood trickling down her mouth. Perfect. Now that your holy spear has penetrated Emmett (lol), she is no longer a threat. The absurd amount of divine power in it should shatter her soul any second, causing her to become just an empty shell which you can turn into light, just like the cultist.
You wait for several seconds as she clutches at the spear and sputters up blood, swearing. Strange... why is her soul not being shattered? Every other being you've ever stabbed with the Longinus, demon or otherwise, has died nearly instantly from it. You watch in horror as Emmett grab hold of the Longinus and with amazing willpower, simply pulls it from her stomach with a grunt. The edges of the flesh-hole you've just carved glow golden.
She heaves once, and sprays golden bile onto the grass. It sits there, steaming with light, as it slowly dissapates.
"What in the name of all that is holy was that?" You ask, tense.
She grins, wiping the blood from her lips. "Malachi." She says through a grin.
You flinch. You... just... destroyed an angel's soul... a cardinal sin... You...
No!
You can't doubt yourself now. This is not the time. Emmett is holding your weapon, yes and she is still alive after being run through with the Longinus, true. But look at your advantages. She's lost a lot of power, she's got a gaping irreparable hole in her stomach, and she has no way of reaching you while you can fly.
"So how does it feel, knowing you killed an ang-oof!" She starts to say, spinning your Longinus casually in her hands. Before she finishes talking, you're already next to her, swinging your fist into her face. She spins backwards, and skids across the bloody grass, releasing her grip on the Longinus.
"Shut the fuck up," You say, mockingly, as you walk over to pick up the Longinus. "You've lost."
She stands up, rubbing her chin and smiling. "I've only just begun." She says snidely.