Theo

''This article is about the Manga version of Theo. For alternate pages referred to by this name, please click any of the icons above.''

Theo (ティオ) is a twelve-year-old orphan from the Grand Valley orphanage who was later transferred to Goldy Pond to become prey for the Poachers to hunt. After the death of his brother and sister, he temporarily joined the Goldy Pond Resistance along with Emma to defeat the demons of Goldy Pond.

History
Theo was born in 2034 and raised at the Grand Valley orphanage, growing up alongside several other children including Monica and Jake. At some point, he and his brother and sister were shipped out and sent to Goldy Pond to become prey for the Poachers to hunt. Although he and the others were briefed to hide from the monsters when the music started playing, Theo thought that the monsters weren't real and chose to ignore the warning.

Appearance
Theo is a young boy below average height. He has slanted eyes and short gray hair that is slicked back to the back of his head. He wore a white hooded jacket with white pants and brown boots. While at Goldy Pond, Theo's attire was covered in filth and blood. After having fled from Goldy Pond, he began to wear the standard clothes available in Shelter B06-32; and after the time-skip, he was seen to have grown significantly taller. His Grand Valley identification number, "FIII715-412", is tattooed across his upper chest.

Personality
Theo is a joyful young teen who loves his siblings, Monica and Jake, to great lengths, sticking together with them even when Emma ordered them to split and flee from the demons. He also seems to have some courage, this was shown when he tried to protect Jake and Monica from the Poachers. It is furthermore implied that he is not stress-resistant because he started to cry when Leuvis cornered him and his siblings. This was confirmed when Theo had a breakdown after seeing Jake and Monica die before his eyes, leaving him broken behind. This changed when he began living with Emma and the rest in Shelter B06-32 where he regained his cheerful expression because he noticed how they treated him as a family member.

Search For Minerva Arc
Theo, Monica, and Jake were first introduced in Goldy Pond, in which they were going through their first encounter with the Poachers, with Theo being presumably hurt in the encounter. However, Emma swung an axe at Luce and told the three to run.

After reaching safer grounds, Theo and the others briefly introduced themselves to Emma. He thanked Emma and the unknown girl for saving them. They were then told to tell the monsters to come after her if they were to be killed, and then they split up, with Theo, Jake, and Monica heading downwind of where they were.

Leuvis expected the children to head downwind and tried to kill Theo, but this time Jake protected him and got himself killed in the process. Theo and Monica fled the scene, but Leuvis caught up soon and killed her on the spot, leaving Theo devastated behind.

As Theo managed to flee to the village, he was left panting and covered in filth and blood after escaping from Leuvis. As Emma approached him and questioned Monica and Jake's absence, a devastated Theo soon explained their deaths, as he cried out the pain he has within him and recalled the times he and the two had spent in the orphanage they were once in.

Human World Arc
Upon arriving in the Human World, Theo is seen to be visibly worried and shocked about Emma's disappearance. Theo, along with the other children, agrees to search for Emma so they can reunite with her again. Over the next two years spent in the Human World, Theo began attending school. During spring 2049, he finally reunites with Emma again and cries tears of joy, even though she lost her memories.

Jake and Monica
Theo was known to be very close to his two siblings ever since the time they had spent in the orphanage they were once in. The trio was seen together even during desperate measures during the poachers' hunt, showing how attached he was to Jake and Monica. After the two's death, Theo was left devastated and traumatized, recalling all the memories he had with them as he screamed out the pain he has within him.

Emma
Theo is very grateful to Emma for saving him and his siblings.

Leuvis
Theo absolutely despises the demon for killing his siblings but he could not do anything about him because of his fear of the latter.

Weapons
Theo used a knife for self-defense against the poachers.

Trivia

 * The following are Theo's rankings in some of The Promised Neverland's official popularity polls.
 * In Shounen Jump's popularity poll results announced in Chapter 88, Theo is in 44th place.
 * In Shounen Jump's 2nd popularity poll results announced in Chapter 102, Theo is in 42nd place.
 * Theo is the only one of his companions to survive the first day at Goldy Pond.