...For what it's worth, this genuinely doesn't look like it would cause anyone to Fall or Rise that wasn't predisposed to, in some way. Yes, it's built atop a Charm spell, but it's not a Dominate. It cannot make you act against your nature.
Not that Nocticula actually knows that Milani is concerned about that.
I offered it because what you see in her, I see in her. A strange claim to make, when I am a lord of seductive assassins and you a goddess of revolutionaries, but as much as the very structure of the Abyss itself would deny me compassion, I am the demon lord of subverting that order. Nothing is allowed to enslave me. Not even myself.
And so I offer this because the bright-shining weaver, assassin of gods and monsters, needs all the help she can get, and she has made friends and allies of enemies much more fervent - indeed, of monsters that before her none could even speak to. She has toppled an adamant statue of oppressive tyranny, she has outfought a god of war himself, armed with only his crippled queen and mere wit and will. It was her ability to turn the slings and arrows of misfortune - and what a wonderful phrase that is - against her enemies, once she'd suffered them herself, that truly brought down the mighty beast - for all that cunning and keen tactics got her to the point where she could try. In another life she'd be a bard beyond compare, and to leave her with only a way to exploit the fruits of Cunning risks her loss as someone either of us - at least as we wish to be - would care to empower. Even a heroic heart can break upon the coldest logic, and hers still bleeds.
Perhaps I offer this power for other inscrutable motives, but neither of us are Lawful gods - to be legible in Their way is anathema to Chaos, you know this. Neither of us could do that if we tried. Regardless, I do not usually lie to those who I am attempting to help, when their success is mine - as this is, because, again, I prefer not having Deskari rattling around in my realm. To lie to you anyway would thus be blindingly stupid.
Closing the Worldwound is my honest goal. Making that easier to accomplish is my honest motive. Alushinyrra does not need, nor want Deskari. (Alushinyrra does not desire Baphomet either, but he's harder to smack down with only control of the simplest sorts of vermin, despite the versatility of well-used coloxi.)
...There's more, though, that she is not saying.
Not that all of it is something Milani definitively will not see, or that some of it is even particularly hidden - but that it is something she wishes to not speak of.
That she saw in Taylor's memories a miraculously avoided death, and remembered a time when she, too, was weak. Remembered the promise she made to herself that never again would that happen to her - or to others, had she the chance. (She killed the demon lord who violated her. Taylor managed to move past the bullies and betrayers that left her to die - in a sacrificial ritual Urgathoa would have been proud of - enough to convert one. She's faintly impressed.)
That she has not been acting for Taylor alone, that the Cult of the Redeemer Queen, as tenuous as they are, speak a truth when they say that Nocticula plans to ascend to a much different portfolio than one following from the example of Lamashtu.
That one part of her intended portfolio is certainly outcasts and the abandoned, which Taylor most certainly qualifies as.
That another part is art and beauty and expression, and she saw Taylor make butterflies dance, saw the pride she took in spidersilk weave, saw the righteous passion at ill-treatment and ostracism that nothing truly extinguished and she too shares.
That she saw Scion die. That it echoed in her core like the moment she slew the lord of invidiaks, the myth of Taylor resonant with her own, a sympathy deeply established.
That she saw Taylor, Skitter, Weaver, adopt a pack of feral supervillains, and lead them in carving out territory in her Brockton Bay so much akin to the way Nocticula has carved, from the fabric of worlds lost to ruin, her own demesne - the Midnight Isles. That Skitter died protecting them.
That Nocticula has much in common with Taylor herself, if one looks carefully.