Kaitou also stepped back to dodge the flames. Fire element and might resist physical... So Marie, Vishnu and Yoshitsune are out.

Since buffs and debuffs were already covered, he decides to try to go for the most obvious potential weakness first.

"Mother Harlot!"

The persona sends out an Ice Age and given that Mother Harlot also has Ice Amp, that boosts the ice attack even more.

Hopefully ice is the digimon's weakness.