In a series this methodical, I would expect some earlier indication that he's a violent person. There was no indication of that in BB, and there hasn't been an indication of that in BCS

In that case you'd still expect it to follow certain lineages, which I guess hasn't been completely ruled out

They haven't said yet. Seems like it pops up kind of at random though - every time there's a conclave they kill off all the nightbloods who don't become commander, so it doesn't seem to be genetic

The moment they mentioned him I thought of the Nyko Watch comments I've been seeing each week! Glad to see you caught the reference to him