Not being human, a claim or a bond might work different or not at all; if it ever comes up we can figure it out ;)
Kei wouldn't set off any angelic warning sirens; the reaction would be more about active death-related powers. If Devin learns about it, though, that'll be An Awkward Conversation.
As for the devil ehehehe, that's definitely interesting. I think between that and the soul-eating, the aspect might be a little unsettled around Kaltz, especially if Kaltz uses his powers. It wouldn't be much more than a niggling uneasiness that Devin can't really place, though he'd understand it better if he learns what Kaltz is. We can play around with it, if you want it to be more or less a Thing.
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Kei wouldn't set off any angelic warning sirens; the reaction would be more about active death-related powers. If Devin learns about it, though, that'll be An Awkward Conversation.
As for the devil ehehehe, that's definitely interesting. I think between that and the soul-eating, the aspect might be a little unsettled around Kaltz, especially if Kaltz uses his powers. It wouldn't be much more than a niggling uneasiness that Devin can't really place, though he'd understand it better if he learns what Kaltz is. We can play around with it, if you want it to be more or less a Thing.