Lexi is a boisterous cab-forward engine who works at the Steelworks on the Mainland.


Thomas & Friends

When Thomas travelled to the Mainland, he befriended the experimental engines: Lexi, Theo, and Merlin. Thomas encountered Lexi and Theo in an empty yard, where he was warmly welcomed and refilled with coal. Later, Lexi, along with the other experimentals, helped Thomas rescue James, who had been trapped in the Steelworks.

Afterwards, Thomas encouraged Lexi (along with Theo and Merlin) to stay with Frankie and Hurricane and call the Steelworks their new home.


Lexi is an eager and excitable engine. She is proud of being experimental and 'cab-forward'- even though she is convinced this makes her an un-useful engine.

Lexi is upbeat, cheery and outgoing, and likes to experiment with how she presents herself, often trying out different voices and how she phrases her expressions just to see which one she thinks works best. Lexi is not always confident she gets things right, but she loves the excitement of anything new, is very sociable, and keen to explore new things.

Technical Details


Lexi is based on the North Pacific Coast Railroad Cab-Forward 4-4-0 No. 21 "Thomas-Stetson", a rebuild of NPCRR #5 which had been wrecked in 1897. An innovative engine built by Bill Thomas, it is considered the first cab-forward locomotive and was one of the first oil burners, as well as the first locomotive to use a marine boiler. The engine had insufficient adhesion weight and its oil burners were prone to damage due to their proximity to its water tubes, and it was unpopular with crews, and its unusual appearance earned it the nickname "The Freak". #21 was scrapped in 1905.


Lexi is painted light turquoise with a gold cowcatcher. Her front windows have gold lining, and her side windows have copper lining. Her main body is covered in rust. She has brass nameplates fixated on each side of her cab and the initials "N.P.C.R.R" painted on her rear oil tank.


Voice Actors

Audio Files


First used Last used Sound Effect
Journey Beyond Sodor Active
Lexi's Whistle


First used Last used Sound Effect
Journey Beyond Sodor Active
Lexi Bell


  • Lexi has received several modifications compared to her basis:
    • Lexi has been modified to accommodate a face, as a lamp would actually be where her face is. Her lamp has also been moved to her added footplate.
    • She has been modified for working on British railways with the addition of buffers and a screw-link coupling on her tender, as well as brake-pipes on her front and back.
    • She has been re-gauged from 3ft gauge to standard gauge.
  • Lexi speaks with a Scottish accent and imitates many other dialects, despite being based on an American engine.
  • Just like Yong Bao, Lexi's tender wheels are actually reused from Marion's wheels, and her bell is reused from Belle's bell.
  • She is the only cab-forward steam locomotive in the entire franchise.
  • Lexi shares the same whistle sound as the Rainbow Sun, Rocky (in his debut) and Carlos (intially).


View content


Name Released Discontinued Highlights Photo
Lexi the Experimental Engine
Comes in Greatest Moments pack with a plank truck.


Name Released Discontinued Highlights Photo

* RWS only | ** T&F only
International Characters

* RWS only | ** T&F only | ✦ Changed location
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