Arcadia is a Hoary bat who lives in one of the artifical forests. Shade Silverwing and his compainons encounter her at the beginning of Sunwing. She believes that the artifical forests are part of Nocturna's promise to the bats, because in the forests, the bats are able to fly during the day, due to bats and other animals being kept in other areas in the building. Shade does not agree with Arcadia, and believes that the dimmed sun that they can see through the building's roof is not the extent of Nocturna's promise.