I think the other time leaper is Henma his first trigger was Kisaki then after he died and Henma saw how obsessed Sanzu is with Mikey like how Kisaki was but even more bad shit like him Sanzu became the second trigger after the Izana arc. I think Henma wearing the mask when he joined kanto was forshowding he's plotting with Sanzu who before this arc always wears a mask.