Pandora in the Crimson Shell: Ghost Urn Vol. 22

HERE COMES A NEW CHALLENGER! Bydo, the extremely hostile virus crafted by Poseidon, has overcome all defenses, even those thrown up by P2501 (A.K.A. Niko-chan). But just when all hope seems lost, a new hero enters the fray. Who is this mysterious newcomer, and are they strong enough to overcome Bydo?