You're my hero, big sister. -Tammy to Xion.
She looks like her father. She is an all around sweetheart, and is always looking to have fun with everyone.
- Her brother DJ
- Her mom Shira and her dad Diego
- Being kind and helpful to others
- Vanilla sweets
- Princess Cadence
- The color purple
- Playing with Lily and Flurry Heart
- The Chameleon
- Xion being sad
- Being wet
- Being alone
- She and her brother Diego Jr. will be born in the chronicles episode Security for Sabertooths Part 1 and Security for Sabertooths Part 2.
- They look up to Xion as a older sister. Jeffrey is also like a second father to them.
- Tammy views Xion as her idol.
- Tammy's favorite color is purple.
- She and DJ never argue, but they do have their disagreements.
- Tammy's dream is to someday be a heroic duo with Xion. This is accompilished in Jeffrey, Jaden & Friends join Men in Black.
- In Power Paws, Tammy and DJ will get super powers. Her powers will be ice breath, heat vision, super strength and a super roar. She will soon gain other powers.
- Tammy becomes close friends with Sweetie Belle.
- Tammy and DJ will be the main protagonists of Tammy, DJ and The Adventures of Elmo in Grouchland.
- Tammy has a strong dislike for chocolate due to her being allergic to it.
- Courtney stands up for Tammy and DJ by getting into constant dog fights with Fang.