That sword — it's Excalibur. And you — I'm guessing they slotted you into her role. If that's the case, then it's possible the only way out is to form a contract.

[She wonders, as Caster tests her shield again, if they'll even live long enough to forge one. Should Gray hesitate too much in her decision they might just be goners. But Rin isn't one for quitting if she knows there's a chance she can succeed.

But ultimately she will leave it to Gray. Rin may not know the circumstances of that face, but no coincidence has ever occurred so conveniently. More than just that intriguing scar has to be what keeps her hood up.]

I can start the incantation now if you agree.