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
- Her whole family
- Being kind and helpful to others
- Vanilla sweets
- Sweetie Belle (her best friend)
- Sandwiches (especially golden egg-which's)
- Princess Cadence
- The color purple
- Playing with Lily, Flurry Heart and Bruce
- Black Widow
- DJ's girlfriend Snowflake
- Boo-Berry cereal
- The Macarena
- Treasure hunting with DJ and Snowflake
- The Chameleon
- Xion being sad
- Being wet
- Being alone
- Chocolate (due to her being allergic to it)
- Getting gum, syrup and other sticky things in her fur
- Elmyra Duff
- Mr. Director
- Baloney the Dinosaur
- Spiders (as of Jeffrey, Jaden & Friends' Storm Adventures of Harry Potter and the Chamber of Secrets)
- Being treated like a pet
- She and her twin 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 accomplished 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 like invisibility.
- 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.
- Tammy forms a big sister bond with Bruce Dragonheart.
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