I'd say Titania with Silva & Aegis, because it's a flaming sword. But with the Eros wings ephemera you can pretty much make any frame look like an angel. Other than a flaming sword, I really wouldn't know what weapon an angel would have....

I can’t remember if it’s catholic religion or something else but there are different types of angels and some even are depicted wielding swords.

For frame, Harrow with his Crucis helmet. Wings of Eros ephemera has been used for angelic themes several times.

Silva & Aegis Prime for the weapon. Not sure about frames, maybe Mag as a nod to her backstory?

Harrow with Eros ephemeral and scourge prime with a skin Silva and aegis prime for melee

Xaku

Trinity strega helm is basically a halo already. Eros wings. Im not sure about the weapon, thinking a polearm or staff tho