Isobella is a Yellow Sentinel Steam Lorry. She is a member of The Sodor Construction Company and is friends with Kelly, Jack and Alfie.
Appearances:
- Season 8:
- Season 9:
- Season 10: Lorry's New Flatbed
- Season 11:
- Season 12: Greetings, Montague! (not named; does not speak)
- Season 13: Bert's Arlesdale Fail and The Duke of Hazard (cameo)
- Season 14: Flat Stanley (cameo)
- Season 15: Toby's Turntable Fable (cameo), For Whom The Belle Tolls, Polar Express Coming Through! (cameo), The Island of Misfits Engines (cameo).
- Season 16: Henry's Hill
Specials:
Basis:

Isobella is Based on a Morris' Shrewsbury Vintage Sentinel Steam lorry. Elizabeth also shares the same prototype.
- Characters
- Sodor Construction Crew
- Trucks
- The pack
- Road vehicles
- Non-rail vehicles
- Protagonists
- Lorries
- Non Rail
- 2009
- Try me
- Females
- Vehicles
- No 22
- Television Only
- Non-rail Characters
- Introduced in 2009
- Retired in 2013
- Retired Items
- 2009-2013
- New in 2009
- Non-front magnet
- Wooden Railway
- Female Characters
- Television Series Only Characters
- Learning Curve
- Non Wood
- Merchandised Characters
- Characters that Work
- Vehicles that Work
- Top Lifts up and Down
- Top Pushes Down
- Characters with Trailers
- 2009 Introduced
- Introduced
- Model Series Characters
- TV Series
- Yellow Non Rail
- Girl
- Items
- Yellow Characters
- Yellow Vehicles
- Television Series
- Female Non Rail
- Machines
- Yellow Try Me
- Female Try Me
- Model Series Only Characters
- Yellow The Pack
- No XXII
- Yellow Road Vehicles
- Female Road Vehicles
- 2009 Items
- Yellow
- TV Series Only Characters
- Off Rail Vehicles
- Keekre24
- Try Me Characters
- Off Rail Characters
- Characters With Numbers
- Try Me Non Rail
- Yellow 2009
- Yellow Items
- Yellow Merchandised Characters
- Characters with Whistles
- Characters That Make Sounds
- Thomas and Friends Characters
- Television Series Characters
- Yellow Characters that don't go on Rail
- Characters that don't go on Rail
- Characters with Faces
- Yellow Characters Introduced in 2009
- Vehicles with Faces
- Female Characters with Faces
- Yellow TV Series
- TV Series Characters
- Wooden Railway Characters
- Non Rail TV Series
- Merchandised Characters with Faces
- Try Me TV Series
- Merchandised Vehicles
- Merchandised Non Rail
- Introduced Characters
- Introduced Items
- 2009 Try me
- Female Items
- Merchandised Items
- Wooden Railway Items
- Items that are Wooden Railway
- Characters that are Wooden Railway
- Wooden Railway Non Rail
- Wooden Railway and Wood
- TV Series and Non TV Series
- TV Series Characters with Faces
- Wooden Railway Characters with Faces
- Characters with Names
- Female Lorries
- TV Series Characters with Whistles
- TVS
- Model Series Non Rail
- TVS Characters
- Television Series and Railway Series Only Characters
- TWR Try Me
- Off Rail
- TV Series Off Rail
- Introduced in Season 6
- Model Series Off Rail
- TVS Only
- Items with Faces
- TAF
- Model Series
- Toy Characters
- Characters who are Number 22
- Thomas and Friends Only Characters
- Television Series Exclusive
- On TV Series
- TVS and Non TVS
- WR Characters
- WR
- Faced Characters
- Characters that go on Road
- Characters with Merchandise
- 2010
- Introduced in 2010
- Merchandised Characters that go on Road
- Wooden Railway Characters that go on Road
- Characters with a Face
- Vehicles with a Face
- Characters with a Cab
- Narrow Gauge
- Merchandised Characters with a Face
- Characters with Windows
- Yellow Introduced in Season 6
- Characters who Appear in Keekre24's Series
- Introduced in Jack and the Pack
- Characters with a Roof
- Characters that go on the Street
- Characters with a Square Face
- Numbered Characters
- Characters with a White Face
- Number 22
- Characters that go on the Tracks and Road
- Characters with a Red Bufferbeam
- Red Bufferbeams
- Characters with a Whistle
- Characters with a Funnel
- Steam
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