Can The Knight of Treachery be redeemed?(RWBY x Fate/Apocrypha)

Nothing more than a pawn

Buildings in ruins,half eaten corpses as far as the eye can see,the great walls of Camelot nothing more than chunks of fancy wall on the ground.The still working part of his mind noted goliath footprints by the dozen.
This wasn't supposed to happen!
The reason he'd drawn out his father and his army of sycophants masquerading as chivalrous knights to Camlann was twofold.Firstly he didn't want a protracted siege,Secondly a king had to have subjects to rule over.The resulting  negativity from a siege and the subsequent food shortage would have had them buried in grimm.The plan was to have Morgana and a quarter of his forces take over the defenceless city,kill the wizard who sleeps around more than actual paid whores,Merlin and by the time he'd come back weary but victorious he would a have a coronation and then a feast and he would be ten times the king father ever was.
Of course nothing was ever simple as his dreams were crumbling around him just like that tower that just exploded.
Wait what!?
Yes while he was daydreaming of a kingdom where the name Arthur was outlawed,a tower as well as a side of a wall exploded in a  great flash of green energy.
"Merlin?"he exclaimed
racing to the explosion.Traversing through streets where he grew up,then halls where bittersweet memories replayed through his mind,the finally the great hall he saw Merlin fighting against Morgana,bolts green and purple flying every which way scorching walls and cratering  ground.
"Morgana,I'm here let me help"!said Mordred preparing to rush in.
"No you'll only get in the way"She tiredly replied
However in that moment of distraction Merlin took the chance to blast her into a wall.
Mordred rounded on Merlin with hate in his eyes and murder on his mind.
"I implored Arthur to get rid of you the moment you were born,you who were born of incest and deceit,told him that you would only bring ruin to the kingdom.And when I saw you sitting there at the round table I hoped,prayed that my judgement was off,but as always I was right,now I shall finally do what i should have done all those years ago"and as Merlin was about to chant the wall behind him exploded and a red beam of power screamed towards the wizard who quicky put up a shield.Though it wasn't strong enough and the beam tore throught the shield as well as the wizard's left arm.The wizard's face that showed fury now only showed resignation and resolve.
The thing then made its entrance.It had a womanly figure,its body draped by a black dress,adorned by jewelry and other accesories.It's skin and hair was pale,as white as the shattered moon,crisscrossing its skin were black bulging veins ,its eyes a red on black that swallowed all light.
"Ozma"it intoned in a voice belonging in the dreams of men and the envies of women.
During this time Mordred picked up his mother/big sister figure's body and hightailed it out of there,running away from the creature,the wizard and this wretched nightmare he found himself in.