Tatiana Gemfield is a crystal fairy and the only princess of the fairy kingdom of Mythrilis. The kingdom is known for producing rare and valuable minerals, metals, and gemstones, which is where it gets it's name from. Her father, King Cadmus, became protective her after the death of his wife and after she was kidnapped by a disgruntled fairy.
Tatiana has wings, but is terrified of flying on her own due to the kidnapping incident. She was accidentally thrown from a cliff and was injured. She enjoys reading books and can identify gemstones and other metals at a glance.
Due to the bad history between the butterfly and crystal fairies, she and Mariella did not get along during their first year. Over time, they learned to let down their barriers and became friends through their shared love of books. They share a flower pod named Magnolia.