Senku wouldn't think it was something to do with Inigo exactly, because he understood the impulse, but his relationship with Gen was just different, in that they'd done so many things together that leaving the other behind was pretty much non-negotiable at that point.

"That hasn't happened to me yet." Senku shook his head. "So I don't know if it's a specific thing to Tidus, or if it was just where he was at the time. That's the whole thing. These things know so much about us, and I suspect more than we think." He pressed his lips together.

"It's beeped at me for my allergies too, which is very specific to me, that's why I think there's more going on than we understand."