I'll write for Billy if I have to.
The Blue Testament is not used to facing children - a high schooler, facing off against one of the most powerful beings in the universe? Pathetic! Still, a better showing than that ugly female Vector scientist. While Soji may challenge divinities personally, Virgil has fought and overcome Mary Magdalene and Jesus themselves - the heathen Soji is nowhere near the power level of either of them, and thus, Virgil will have a field day here. All he truly needs is a single shot of Shadow Wing S to stop Soji in his tracks. Backed by speed and evasion that Mary herself had difficulty overcoming, Soji won't easily be able to stop the mighty Virgil fast enough. Alternatively, Virgil can overcome him in a one-on-one battle - Victim's Hail followed by Vengeance Breath will break, silence, and turn Soji into a prone target with little recourse but to surrender or die. All who challenge one of the Testaments invites death upon themselves - the power of the other self means nothing when stacked up against one who challenges the very gods themselves and lives to tell the tale.