The first thing Parca hears after Jezebel's maneuver and her demand is Bansui's voice in their head.
"Thou are… the truest of fools."
Parca, stumbling backwards more out of pure shock than pain from Jezebel's attack moments before her blade would have made contact with his mask, first openly replies to Bansui, vexatiously shouting, "Hey HEY DON'T BE CALLING ME A FOOL, YA FOOL!"
Parca then slaps the side of his head, as if that would actually do anything to Bansui.
Bansui merely heaves a sigh, and then says within their shared mind, "Please, pay… attention, to her, before she… hits thine throat again."
Parca wanted to continue arguing with Bansui but they were right, better to pay Jezebel his attention.
Feeling around his throat where moments ago there was a scratch from Jezebel's blade (an insignificant mark that was quickly reversed by his High Speed Regeneration), Parca points at her and then blithely says, "that was mean, not nice not nice at all, ya don't slit yer pal's throats!"
Parca, throwing up both their hands in a very ecstatic manner, cackles and then adds, "not unless they be annoying ya anyway, but yer new pal Parca ain't like that!"
Parca then goes on to take a very exaggerated bow, before numerous smaller, baser Hollows pop up out of the sands around Jezebel, all of them harboring that eerie, indigo glow to their eyes that was seen before.
"Friend, friend, be Parca's friend, he can be trusted," the smaller Hollows all chant in repetition, each of them steadily getting closer to Jezebel, "friend, friend!!"
"There be so much we can do together, pal of mine!! Ya got so much spinning around in that Soul of yers!"
Parca slowly rises from his bow, the glow in his own eyes intensifying, which seems spur the Hollows circling Jezebel into a haphazard, and potentially unsettling dance.
"The worlds ain't ready, ain't r e a d y, for the fun us two are going to have," Parca, reaching out toward Jezebel again, his hand passing through the circle of Hollows around her, "and ya want to have fun pal, don't ya, don't ya?"