Percy The Small Engine

Percy is a green saddletank engine who was brought to Sodor to help run the railway during the big engines' strike. He is one of the youngest engines and is quite sneaky, often looking to trick or tease other engines, sometimes getting him into trouble. Percy's favourite job is to deliver the mail and he works on Thomas' Branch Line as a goods engine, and his ben his very best friend ever since the day they met.

LOTM Storyline
Percy will most likley want to help Thomas in LOTM: The Angels Return.

Aside from that, he shares a similar personality to Ritchie from Pokemon, although they've only seen eachother a few times at all.