Being an elven princess Priscilla had no peers growing up, her best friend was Twilight Sparkle (TS) an Animated Toy that was gifted to her at birth by Unknown

Priscilla Secret Origin

As is typical for an elf, her childhood trances pulled from her previous lives and their memories. During her First Reflection, which is the first time an elf experiences a memory from their waking life, she re-lived the suppressed memory of seeing her parents communing with Unknown and promising to sacrifice her as a part of a ritual that would permanently bind Minnoa to the Feywild. This sacrifice was to take place on her First Reflection, but she fled as soon as she awoke from her trance. During her flight, she was almost captured and lost Twilight Sparkle (TS). Twilight Sparkle (TS) fully awoke then on the side of the road with only a few clues and a burning desire to find Priscilla.