Rhopalocera is only a few days older than Sosene, the two Raulf pups born of their mother only days apart. Their human has been accommodating in keeping them together- much like Cumulostratus and Cervidae, the two are very attached to each other.

Rhopalocera is named after butterflies, while her sister is named something Samoan, making them the first pair to not share scientific names.