Milly

Milly (ミリー, Mirī) is one of the minor character of The Promised Neverland. She is a 1-year-old orphan who formerly resides in Grace Field House Plant 3 as one of the many foster children of Isabella. She only appears in the manga.

History
Milly was born at Grace Field in 2044 and sent to Plantation 3 a year later in 2045, growing up along with several other children under the parental care of Isabella. She sleeps in Isabella's room and was left behind with the younger children at Grace Field House, while the children over 5 years old made their escape. She is first shown in chapter 100. Along with Phil and other younger orphans like Carol, Eugene, Charlie, and Sherry, Milly now resides in at a different plantation at Grace Field under the care of Yukko after the Grace Field House Plant 3 was burnt down.

Appearance
Milly most likely has average height, build and hair length for a girl her age. Like all the other children at the orphanage, she wears the standard white uniform, albeit the one for small children. Her identification number is tattooed on the left side of her neck.

Personality
Milly is a happy, well-cared for girl, who loves her family.

Introduction Arc
Taking daily tests, playing a game of tag and hide-and-seek, eating scrumptious homemade food and having a good time – Milly went through the same routine every day in Grace Field House.

Jailbreak Arc
On the night when the House burnt down, Milly was seen expressing concern regarding the absence of her 15 older siblings. After Isabella failed to retrieve the older children, Mike was seen sleeping with her other siblings who were left behind, being cared for by Isabella. Emma promises that she will come back within two years to rescue her siblings from Grace Field.

Cuvitidala Arc
Two months after the escape and Grace Field House Plant 3 burnt down, it is revealed that Milly was transferred to one of the other plantations at Grace Field. She now resides on a new plantation along with some of her other siblings.

Return to Grace Field Arc
After getting the word that all the farms are to be abolished, Emma returns to Grace Field House to get Milly and the others.