But where exactly did Rose Vesper obtain these two Authorities?
The Authority of Sloth is easier to understand.
Rose Vesper once traveled to the Endless Sea.
According to Augustus's records, he once pursued the Sloth Witch, wanting to snatch the Divine Authority from her, but the Sloth Witch was too lazy to fight him and dived into the Endless Sea, forcing Augustus to give up.
Rose Vesper could have accidentally encountered the Sloth Witch while searching for the Mermaid's Heart, and then acquired the Authority of Sloth from her.
But as for the jealous authority, where did Rose Vesper obtain it from?
According to Adelina's research, after the host of an Authority falls, it will self-select the host that matches it best to reside in again... perhaps, the Envy Witch fell without anyone knowing, and the jealous authority chose Rose Vesper as its host?
After all, Rose Vesper's jealousy is truly terrifying.
