As always, Ketsu felt the slightest twinge of anticipation as he passed through the Rc Gates - but, as always, he found himself free to move through them without hassle. For a moment, he let himself reminisce: whatever his old man had done to let him pass for human in their artificial eyes, he was beyond grateful, one of the rare times he felt such an emotional connection.
But back to the topic at hand. He nodded a few times as Seto made his speech, describing the options before them: a Chimera with multiple kagune; a ghoul who had acquired a quinque; or perhaps a being who wasn't a ghoul at all. A
human, in other words. Ugh. And he'd had such high hopes; if they were some human murderer, it was barely worth considering them as food. Unless... perhaps a human woman had gotten pregnant from a ghoul, and resorted to cannibalism the way his own mother had? That might be a juicy proposition after all. Unlikely, but possible.
'I will say,' Ketsu mentioned, 'it's probably safe to assume the killer is a ghoul of some sort. Even if they were human, it'd take a lot of effort to deal as much damage to the bodies as you've described, and it's not necessarily as if they couldn't have additional motivations beyond feeding themselves.' He took a brief moment to collect his thoughts, and to examine the changing scenery. They'd just begun walking through a local park, a pretty nice-looking place at this time of year. The trees were in full bloom by now, their leaves a deep green colour, and the park's flowers had sprung up long before, planted and maintained by the local groundskeepers to provide a rather enticing rainbow of beauty. Even if he considered himself quite practical, Ketsu could at least appreciate the effort that went into works like these.
'You proposed they were a potential Binge Eater earlier, right?' he eventually continued, stroking his chin as he voiced his thoughts. 'Or at least a proto-Binge Eater. But, perhaps it's not just themselves they're feeding? They could be bringing flesh back to their child... or, for instance, to some third party. I couldn't say why they'd be doing that, in the latter case, but unless they're simply mutilating their victims for a sick thrill, I imagine there might be some extra motive to these attacks - and we've established that they're too intelligent to just be a raving lunatic, at that.'
Ooh, perhaps the father is doing the killings, he considered silently, adding another layer to his "half-ghoul child" theory. But at that point, it may well also be a regular ghoul...
'Either way, I can only assume Mrs- Ms, Miss? Uh, I assume Graye will be more than willing to add her prodigious experience to our own,' Ketsu concluded with a smile. 'I trust she won't be too hostile, after all, else how would she have gotten to her current level? Aha... ahh, I'm kidding, sir. I suppose you were referring to her battle wounds? In which case, I'll steel myself for her scars; they can't be that much worse than yours, right?'