Duck is cheerful, busy, mature and tends to bustle about. He is very proud of his noble Great Western heritage, often claiming that "there are two ways of doing things: the Great Western way, or the wrong way", occasionally to the annoyance of other engines. Duck knows how to hold his own and tends to stand for no nonsense from any engines that might get ideas above their station and try to order him or others about; as a result of this and his strength, most tank engines look up to him. He enjoys running like clockwork, without problems or interruptions, making him a very efficient and loyal engine. He takes tremendous pride in the responsibilities bestowed upon him, particularly in his role of running his own branch line as a result.

the voice I'm aiming for Duck is more so focused on his West Country English accent since it is highly important to keep true to his heritage that he holds proud of. Exactly like Steven Kynman's Duck from the later series of Thomas the tank engine.

Example: https://youtu.be/RNUUbgSUdgE?si=_JDGTMcYLbn5uClQ