Unity

History
the power of Unity originally belonged to the sorcerer Mitune, who decided not to pass it down a line of descendants, but chose to disperse it into the fabric of existence as a way of ensuring that it remains balanced. it is later summoned by Dante after he steals the final ancient power of Love and he uses it to summon Creation. Sunset gains it after the others use their the heroes and villains attain it after they unite and use it to summon a more powerful version of Creation, which they defeated Dante with. after he's defeated, Dante retains a residual piece of Unity, which he use to summon a final version of Creation. after time is rewritten, it goes back to being part of existence.

Purpose
not to be confused with Harmony, the power of Unity's job is to ensure that all the different and colliding parts of existence are united and able to work together in order to maintain universal balance.

Users
Dante: after he gained all the other ancient powers, Dante summoned the power of Unity, which allowed him to invoke Creation. after he's defeated, he retains a residual piece of it, which allows him to summon Creation later.

Sunset: after the heroes and villains give her their residual power and she summons Creation, she most likely possesses Unity. after she lose her Creation power, she later manifests it again when she unites with the others.

All the heroes and villains: when they promise that they'll face whatever happens together, they manifest the power of Unity, which recharges their power and allows them to summon a much more powerful version of Creation.