Bloodstone is a gem engine from the Keystone Railway.
When some of the Crystal Island engines visited the Keystone Railway, Bloodstone was seen shunting in the yard
In Bloodstone's first speaking role, it was revealed that she and Dragon Breath Opal do not get along. Later, when Bloodstone and Dragon Breath Opal were given the task of working together to shunt an important gem train bound for Sodor, the pair's constant bickering got them into trouble.
Bloodstone is prone to get jealous when others are given more important jobs than she is. Her constant work in the shunting yard has led her to be very meticulous and very headstrong. She is very organized and often has a "my way or the highway" attitude with other engines in the shunting yard.
Bloodstone is based on an LMS Ivatt Class 2MT tank engine developed for the London, Midland and Scottish Railway. Unlike her basis, Bloodstone lacks a sand dome.
Bloodstone is painted dark teal green with red lining. She also has red piston rods and her green and red gem on her tanks.