wren

When Vinny Caravella was fighting them in the Giant Bomb series and got the extra one to come in, someone on mic uttered the phrase "The fifth fourth king" or something similar, and I think about it every time they're mentioned

They have a substitute for when one of them is sick

That fifth guy is actually just a regent

I think the maximum amount of kings one can spawn is around 12 or so.

you could kill up to four kings or more