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When a diesel railcar named Daisy came to look after Thomas' Branch Line, she constantly kept leaving behind the milk van every time Percy shunted it for her. He was naughty when he asked the trucks to push him past a danger notice, only to end up in the water until he could be lifted out and taken to the works by Henry. Thankfully, he got some help from Harold (who dropped supplies of hot drinks for his crew and the passengers) and was able to get the children home.ĭespite being really useful, Percy was prone to having accidents were due to him sometimes acting naughty or being careless. When Percy had to take the Sunday School children home, he came across a flooded paddock which swashed away his fire. He met a self-centred white helicopter named Harold who said that railways were "slow and out-of-date", so Percy decided to race him and won. With Duck's arrival, Percy was sent to Thomas' Branch Line to help build Knapford Harbour and has stayed there ever since as a goods engine. After this, Percy was subject to bullying from the big engines until Duck arrived and helped Percy to put the big engines in their place, although Percy still received a reprimand from the Fat Controller for it. Percy was still a cheeky engine and often liked to play jokes on Gordon and James, only for the two engines to have their revenge when Percy failed to recognise a "backing signal".
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He was rescued by Gordon and took up the duty of station pilot at Tidmouth.
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Gordon managed to stop in time, but Percy was so frightened, he ran away and ended up stuck in a sandbank. Percy was later waiting at Knapford, but forgot to whistle to the signalman and thus was startled when Gordon came running towards him with the express. At first, Percy liked to annoy the big engines. Bringing him back to Sodor, Percy was charged with running the branch line while Thomas ran the Main Line with Edward and was allowed to stay after the big engines surrendered and returned to work. When the engine said that he was willing to work hard, the Fat Controller bought him and named him Percy. At the engine workshop, the Fat Controller saw a green saddle tank. In 1926, when Gordon, James and Henry went on strike in protest of fetching their own coaches following Thomas' departure to run his branch line, the Fat Controller decided the railway needed another tank engine. He is said to have been found to contain Hunslet parts, among others, according to workers at Crovan's Gate. Percy was most likely built by the Avonside Engine Company sometime after the turn of the century and had a subsequent rebuild in the period before he was sold second-hand to the North Western Railway by a factory on the Mainland.
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