Jenna is the 2nd Ultimate Life Form and is Grace's big sister and Shadow's younger half-sister. She is known as Project: Mystery. She gets killed by Black Doom.
- Gemidi the Hedgehog (Mother, deceased)
- Kratos the Hedgehog (Father, deceased)
- Emma the Hedgehog (Half-Sister, deceased)
- Shadow the Hedgehog (Half-Brother)
- Grace the Hedgehog (Younger Sister)
- Lizzy the Hedgehog (Cousin)
- Melinda Kimocomi (Best Friend unitl death)
- Aster (Friend until death)
- Richter (Friend until betrayed)
- Connor Kimocomi
- Mr. Kimocomi (Adopted Father until death)
- Mrs. Kimocomi (Adopted Mother until death)
- Luna the Hedgehog (Friendly Rival)
- Black Doom
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