This is Melodiana from Kamidori Alchemy Meister.

Her base prompt:

kmdri-ml0d14n4, blonde hair, angel wings, long hair, halo, blue eyes, feathered wings, closed mouth, white wings,

Her outfit:

valkyrie, blue armor, winged helmet, gauntlets, faulds, pink dress, halberd, head wings, multiple wings, shoulder armor, armored dress, pauldrons, belt, breastplate, shawl,

Her weapon:

holding polearm, holding weapon, spear,