It is unknown how Sarvente came into existence or if she had any biological family members or relatives.
Sarvente lived as a demon child for centuries not being able to age due to unfulfilled childhoods. These unfulfilled childhoods did not allow her body and mindset to adapt to the concept of growing up which is how she gained immortal-like abilities. Despite having knowledge, she was still childish. Coincidentally, Sarvente met Ruv as a child and they both became childhood friends. This was the time when she finally started aging because her only wish was fulfilled which was making a friend after waiting for centuries.
Sarvente noticed that Ruv had an eyepatch and decided to lend him one of her ribbons. Sarvente then made a promise to meet Ruv again so she gave him one of her ribbons. The ribbon would be Ruv's current eyepatch. When they both reached adulthood and met again, they do not remember each other and Ruv forgets who gave him the ribbon.
