And a nice guide it is, thanks! So the bishop is like a reverse Echidna, and Olivia is a princess? (her second passive says high princess)
Unsure whether i want to take the wheel of fortune (premium summon) for a spin this event if those two are the spotlights. They looks nice, but not really anything special from what i can see.

That said, this event sure looks like a piece of cake. Checked a youtube video earlier of someone only using silver units, and i was kind of taken back by how low level those units were.