Bluebell

Bluebell is a green tank engine. Bluebell Appeared in Ep 1 in disguise as Mute. He was originally going to appear in Ep 2, But the episode was canceled. Bluebell was also revealed by Leo in a Comment on Tons Of Trackmasters Channel to be The Mad Bomber, disguised as Mute.

Biography:
Not much is known about Bluebell, Other than the fact he looks very similar to Thomas. According to Leo, Bluebell wanted to get rid of Thomas so he could be him, Be blue, And have a face, No one wanted the engine with no face as having a face is what makes the engines popular. So Bluebell disguised himself as Mute to hide his identity. Due to the lack of his face he probably can't talk leading to Mute not talking as well.

Personality:
Nothing is known about Bluebell's personality, Because he is The Mad Bomber, He is evil and cruel, and would do anything to get rid of the other engines. It can also be assumed that Bluebell is jellies of Thomas.

Trivia:

 * It is unknown if Thomas and Bluebell are related due to looking very similar.
 * Bluebell was disguised as Mute in Episode 1 which is the reason why he is releasing steam despite being a Diesel