[quote=@Legend]
<Snipped quote by Yatagarasu>

It seems like it either has something to do with mom, or it’s a too-convenient coincidence. But it’s also weird that Shion seems to stay the same after it happens, [i]except[/i] for her eyes. And the eyes have to have something to do with you, right?
[/quote]

I agree. That the trigger they've found is electricity, and that they don't split further when exposed to more, while your mother has a similar phenomenon, even if caused by different things, it points to a hereditary factor. The fact that her eyes change, which I can only assume is hereditary from my side... The strange part is that the one Shion is so similar to the combined one.