Mavis

Mavis is a diesel engine who works for the Ffarquhar Quarry Company at Anopha Quarry. She also works at the Sodor Slate Quarry. 
==Bio in the Railway Series==
Mavis was particularly fond of putting the trucks at Anopha Quarry in different places, despite Toby's protests. Toby finally lost patience and left Mavis to her own devices. Mavis, urged by Daisy, started to ignore Toby's advice and ended up looking silly when she got stuck outside Ffarquhar. 
Mavis was then forbidden to leave the quarry, but when a thaw increased production at Anopha Quarry, Mavis persuaded the manager to let her go up to the first crossing in order to shunt trucks quicker and formulated a plan to pass the level crossing with help from the trucks. However, the plan backfired when the trucks decided to bump Toby instead, and he ended up being suspended by flimsy rails over a rushing stream and Mavis had to help. Mavis confessed, but the Fat Controller and the Manager were pleased by Mavis' courage and honesty and allowed her occasional trips to Ffarquhar. 
In 1987, Mavis was involved in a collision with a lorry and Toby had to do her work while she was absent.
==Bio in the Televison Series==
When she was introduced, Mavis continuously put Anopha Quarry's trucks in different places, much to Toby's frustration. Toby finally left Mavis to put the trucks wherever she wanted. Mavis was supported to do so by Diesel, and took the trucks to a level crossing, where the trucks held her back and she became stuck on the crossing, trapping Bertiee and Terence. Mavis was rescued by Toby and sent back to the Quarry. She felt embarrassed after the accident, and upset when she was forbidden to leave the quarry. Percy tried to knock some sense into her, but she refused to listen. She eventually made a plan with the trucks to go as far up the line as possible, but this resulted in putting Toby in danger. Mavis rescued Toby, and The Fat Controller let her go further down the line occasionally. 
In the fourth season, Mavis was one of the engines who took over the jobs of the engines who went to England. In the fifth season, she and Toby received help at the quarry from Stepney, who was visiting the railway. 
From the sixth to eleventh seasons, Mavis worked at the Centre Island Quarry. In the sixth season she had clearly matured and was able to keep Bill and Ben in order. When Salty came to work at the quarry, he was upset that he was not working by the sea, so Mavis did her best to comfort him, while trying to stop Bill and Ben from complaining about Salty's talent with working with trucks. Mavis tried to stop Bill from being so jealous and grumpy when Ben went to get new buffers. 
In the seventh season, Fergus was sent to help Mavis and the twins. Mavis got on well with Fergus, and helped him out of a rockslide caused by Bill and Ben. In the eighth season, Mavis was one of the diesels given bad fuel, which resulted in her and the other diesels breaking down. Thomas collected new fuel and helped them. 
When the steam engines and diesel engines were arguing, Thomas turned to Mavis for help as she was one of the few nice diesels, and the two organized a meeting to sort things out. She also helped with the construction of the Sodor Airport, including taking away rubble from the wrecked tower. 
In the ninth season, Mavis was involved in a collision with Percy and Toby. In the tenth season, Toby went to Mavis for help with his jobs, but Mavis was too busy. In the eleventh season, Mavis was left without fuel when Billy forgot to deliver it. In season twelve, Mavis was having a wash at the Sodor Slate Quarry, when she was derailed by Thomas, who was racing with Diesel. 
When Spencer got on the verge of discovering Hiro, Mavis distracted him from Thomas and Percy, by guiding him to back up right underneath the operating slate hopper so he had to be taken for repairs at the Steam Works. In season thirteen, Mavis was awoken early by Thomas, comforted Percy who was upset about having no job, was given flowers as a surprise from Emily, who thought she was upset, and attended Hiro's welcome party. She was later convinced by Thomas to shunt trucks at Brendam Docks to impress a Railway Inspector alongside Percy. 
Mavis broke down one day and was taken to the Dieselworks by Salty, where she was surprised to see Percy there. In the fifteenth season, she told Spencer, who couldn't see properly due to heavy fog, that he was at the quarry when he thought he found the Duke and Duchess of Boxford's Summer House. She later broke down again and this time Diesel helped her. In the sixteenth season, she told Gordon to get his bufferbeam mended, even when he tried to convince her he was fine without it, and helped a composer with his song alongside Thomas and some of the Steam Team. 
In the eighteenth season, Diesel took her to see the sights of Sodor, while Thomas did her job at Ffarquhar Quarry. 
==Persona==
Mavis was arrogant until being brought down to earth after her embarrassing incident at the Ffarquhar crossing. Despite this, Mavis is a reliable, honest, hard-working engine, and unusually for a diesel, shows respect for the steam engines. However, unlike most engines, hauling trucks makes her feel important. 
From the sixth season onwards, Mavis has matured and acts as a motherly figure to the other engines. Still being a young engine, she still retains some of her naivety. 
==Basis==
Mavis is a based on the BR Class 04 0-6-0 Diesel locomotive. She is more specifically based on the BR Class 04's working at the Wisbech and Upwell Tramway, as they were fitted with additional cowcatchers and sideplates so they could run near public roads. 
==Livery==
Mavis is painted black with hazard stripes on her front and rear. She has her name and "The Ffarquhar Quarry Co. Ltd." written in white on her cab and sideplates respectively.
==Trivia==
==Gallery==
MavisRS1.png|RWS Mavis
Toby'sAfternoonOff4.png|Mavis' model version