You might see me throw a couple of these names about from time to time:

• Sarantuya (more commonly referred to as Tuya) - the design I ended up with post HSM for Eustace's older sister, made in collaboration with Grace (@qqtahng). See this google doc for details https://docs.google.com/document/d/1U_y80EnDbsU3HL6B8LNTsCuPoe5QzyrDBMIPz9Bx0Vg/edit?usp=sharing
• Savini - Eustace's younger brother. Unlike the sisters, he actually has a canon name and appearance (only as a child though) but his adult version might as well be considered an OC. Made in collab with @orrinmorgentau . Details in this doc https://docs.google.com/document/d/1EtHIS2llopVy7q0nRfT4CrjrNJL3T_vkALIKswgmmTw/edit?usp=sharing
• Shuvuu - my design for Eustace's younger sister. I'm writing her google doc up and trying to get her a proper character sheet commissioned so stay tuned.
• Khorne - Eustace's uncle, I made both him and names up for the rest of Eustace's family before HSM came out. Details of the family in the below thread. Certain details of the parents may still be viable but the older brother has been discontinued in favour of Eustace's canon siblings https://twitter.com/LuckyRainripple/status/1335692736121462787?t=zLYgUz340uhhD0OfRC7ZrA&s=19
• Emil - guy who is just cursed to be eusvane's wingman in every AU ever, he WAS just meant to be a one off character but now he's here to stay just because this backstory is hilarious. No single thread or pic yet but just imagine elm from feh and you more or less have the image.