Originally Posted by
Unregistered
The equipment/manyu-like things are exactly what that sounds like: manyu for equipment. They're among your equipment, not in character slots. The petals, as well as birds and elixirs, are for characters' second evolutions. They require 2 birds matching the girl's element, 2 petals matching her nation and an elixir of her rarity. The wiki's Evolution page goes into more detail.