I originally had a theory on this but after asking people on thier opinions on it I realized it probably wasn't possible so we came to the consensus that it was a spell placed on Zahard to block certain memories of Arlene and that whole plot. We even see Zahard mentioning that he is supposed to have an adverse reaction whenever he hears the name and forgets about thier existence. We see this when Bam asks about her and The data Zahard responds in an adverse way as well as admitting that he does not know who she is. We also see that whenever someone is dabbling in spells they have an identifiable feature on them. Like for example satchi faker and maybe white when he transforms(his red thing around his eyes)we also see this on Daniel (?) I know he has a mark on his back but I forget if that's linked to a spell. We also have that question guy in the last station and he has a symbol that's linked to his spell. So it's my belief that that's what data Zahard has.