Emily is a beautiful Stirling Single tender engine and the love interest of Thomas in Thomas & Friends.
She and Thomas are shown to be close to each other at times, such as working together and helping each other out and could have feelings for each other but struggle to confess it.
Emily is kind, thoughtful, hard-working, stern, and friendly who acts as a sisterly figure to the other engines and though she can be bossy at times, she has a big heart.
However, sometimes, Emily had a habit of being fussy, bossy and rude to others. She had strived to be the best and sometimes caused mishaps, but always made up for them when she realised her errors.
From the King of the Railway onwards, Emily has been portrayed more closely to her original personality, with subtler shades of bossiness and overconfidence. She also often acts as a voice of reason, particularly when James gets too big for his wheels, or when a friend needs moral support.