Gate of Memoirs/Zebra & a Dark Figure

Zebra and the Dark Figure are found in the Gadillian Ravine talking about how to handle the Summoner. Just what could their relationship be...?
Portrait 	Dialogue
Music: "World of Gods" 	Music: "World of Gods"
 	
*Zebra: ......Your way of doing things is roundabout as always.
 	
*Zebra: This is Cardes's territory. I will move about as I please.
 	
*Dark Figure: Heh, that's fine with me. I should like to see what you're really capable of, Zebra.
*Dark Figure: How unlucky that Summoner and his entourage are...
*Dark Figure: Little do they know that the god in their sights once buried tens of thousands of humans.
*Dark Figure: ......This presence.
*Dark Figure: It appears they've arrived.
 	
*Zebra: Hmph...
*Zebra: Seems you're unlucky as well.
*Zebra: I'll defend your honor, and see they leave this place.
Music: "Silent Shadows"	Music: "Silent Shadows"
 	
*Tilith: Come on, ! Hurry up!
 	
*Tilith: Huh? Where'd it go?
 	
*Tilith: There's no mistake that ominous presence was coming from this area...
 	
*Tilith: ! It's all because you dragged your feet the whole way here.
 	
*Tilith: Anyway, doesn't it feel strange here? I don't sense anyone at all anymore...
*Tilith: I'm sure I sensed the presence of a god before...
*Tilith: Maybe it was just my imagination?
 	
*Tilith: Hmm, well, either way we should be making our way toward the Sky Fort!
 	
*Tilith: Let's head for the Gadillian Ravine!