- "Hi, I'm Shelly! Shelly 'The Barracuda' Hedgehog! Welcome to the Station Square Super-Mall, how may I be of service?"
- —Shelly's usual quote (even in emergencies) due to working in a Super-Mall
She is voiced by actress Alexandra Breckenridge.
- Shelly is one of two hedgehogs born in a domesticated family
- According to Shelly, she and her younger sister are avid Sonic the Hedgehog fans but far normalized from Sonic's concerns
- Her favorite color is blue and is often wears in her clothes and jewelry
- Her superpowers contains quick speed and striking at enemies whilst mid-air as well as being able to control the air elements.
- Like many of the Mobians in her home of Station Square, she believed herself to being a "Normal" (hedgehog/fox/echidna/mobian born without super-abilities)
- Her nickname "Barracuda" comes not from the species of the same name or their ferocity (though Shelly prefers that also) but rather the song choice by the rock band Heart
- Shelly and her sister grew listening to 80's ballads
- Shelly loves vegetables but is also very fond of indulging in tacos and Hot Pockets since both are her favorite childhood food
- Shelly has a fear of ghosts and dreads being alone in dark places just manifesting with them
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