The ruler of the tenshi kai, the goddess of love and beauty Aphrodite
returns in Wedding Peach DX to give the Ai Tenshi new powers and support
them whenever they need help. In Volume #1, Aphrodite explained why the
Ai Tenshi are require to battle the akuma again:
Aphrodite was also the one erased the Ai Tenshi's memories due to their requests. She
later saved Momoko from an akuma and revived her memories as an Ai Tenshi.
Momoko then, in turn, revived the memories of the others.