This is the emblem of clan Aeux (formerly called the Crest of House A’rreaux). This clan was formed in antiquity and has emerged as a prominent force among the present-day alchemical clans. Alchemists from this clan play a strong role in the BoA storyline, and some of this clan's prominent members are featured in the Alembic League of Crucible Holders series (ALCH). Clan Aeux has the Harpy as its archetype, which is featured prominently here in the emblem, along with runes from the ancient runic language known as "The Book."