Lady Islington Elrond is the fourth daughter of the Elrond family. She is known as the "Oracle Child", said to be chosen by St. Iris, the Goddess of the Clouds. Knights of the Order of St. Iris have been instructed in the ways of the sword and shield to give their lives to defend Islington. As stated by King's Cross, all knights in St. Iris are expected to kneel upon Her presence. Outside of her official duties however, Islington enjoys sneaking out in disguise and overhear others, as well as providing assistance where requested.

Lady Islington enjoys teasing her youngest sister Paddington, as the two are close in age. Just like her younger sister Paddington, she has a great liking for food all around the world. Personality wise, Islington can rapidly switch between joking, sarcasm and serious emotions.

First appeared in Chapter 14, Lady Islington shared some information on the true nature of the Mist, and requested help from the Conductor's team to assist her and King's Cross's individual research and enter the boundary of the World Tree to investigate the reasons behind the Sea of Mist, using information from both the Resistance and the Mistism cult.

Islington is very skilled in combat. Even without her personal assistant King's Cross, she's still capable of fighting toe-to-toe with Queenrose, thanks to the Goddess's blessings (though at the time Queenrose was also affected . Upon calling the powers of the Goddess, King's Cross has to cast an advanced defensive shield to keep the Mist Train intact. Islington also has the ability to grant iron injections, just like the Conductor.
islington (mist train girls)