Umbra is a Crafter. She's well known for her work all across the many regions on Palettia, making her quite popular! During a younger age, she was entrusted by an elder Crafter with watching the region's Prisma Shard. But as responsibilities increased, she developed burnout and her enjoyment of being a Crafter began to wane.

During a bout of self-loathing and rage, she unwillingly created Ambu, manifested from her disdain towards being a Crafter. However this was a huge mistake, as Ambu developed their own identity and, with their goal of making Ambu happy, has taken it upon themselves of destroying the source of colour on Palettia.

Umbra regrets creating Ambu and is upset they can't easily take them out, but they're willing to join Byn's team so she can stop them before it's too late.