The Thorn Within the Rose
The Roses were a group of adventurers. Their number, names, and abilities have all been lost to time and memory; the only known member to still live is, indeed, The Lost. A few details have survived however.
The spell that keeps Aeia flying is rumored to have been cast by a Rose.
The Thorn Within the Rose is associated with their legend, but whether it was a Rose, an item one carried, a spell, or something else entirely is not known.
The Winter Rose is a legendary flower, said to have been cultivated by one of the group, and the source of their name.
“The Roses in Bloom” is the only surviving piece of art about the Roses, an elven epic song of which only fragments still exist.