Sosene is only a few days younger than Rhopalocera, 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.

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