All Guilds manage themselves internally. They're answerable to the Curio DAO Mission and Ideas, members of the Guilds, and the Cardholders (through voting when needed). This is done to maintain community agreement and trust.
There is no direct hierarchy, the Guilds are partners. It's common for members to be in multiple Guilds.
A group of community artists interested in creating new Curio fan artwork, and minting and airdropping it on Curio Card holders. They collaborate on the technical + financial requirements of large-scale airdrops and work with new artists.