User blog comment:Crimson and Darkness/Volume 25 discussion blog/@comment-32252462-20180420135308/@comment-31654305-20180420140255

for detail, i don't know but in vol 23 that mentioned while joker (dulio) as the king the other member of the team can be taken from brave saint be it other jokers, queen, jack, ace or number

for the seraph dont know except that when to fight trihexa and gabriel that take michael place as queen/king of heaven