Nathan Miller

Miller is a recurring character featured in The 100. He is one of the Delinquents sent to Earth to see if it can support human life. Miller is Bellamy Blake's Lieutenant and his most trusted man.

Personality
Miller seems to be loyal to Bellamy and disdainful of the Grounders. Bellamy noted that the other delinquents listen to him, implying he has some leadership abilities.

Physical Appearance
Miller has light brown skin, dark brown eyes and buzzed black hair. He is built on the slim side. Miller is also known by his signature black beanie.

The Show

 * -| The Ark =

Nothing is known about his life before arriving on Earth, he was under the age of 18 and therefore couldn't be executed. He was then sent to Earth to see if it was inhabitable.
 * Pilot
 * -| Earth =

Miller is recruited into a party to help find Octavia Blake by Bellamy Blake. He is seen being led into territory belonging to the Grounders but decides to return to camp with a few other delinquents.
 * His Sister's Keeper

Miller and Drew are seen assisting Bellamy with a captured and restrained Lincoln. He is tasked with guarding the hatch door into the room and tells Octavia to leave when she enters the room. Miller then watches Bellamy and shortly Raven brutally torture Lincoln. Later when Lincoln thanks Octavia for cleaning his wounds, Miller believes he heard him speak but Octavia denies it and he tells her to leave again.
 * Contents Under Pressure

Miller is seen watching over Lincoln with Bellamy where he informs him that he's told most of the deceased delinquents parents about their deaths. Later when Octavia checks on Lincoln, Miller returns from talking to Roma's parents on the radio and threatens to beat Lincoln if Octavia doesn't leave. Octavia obeys him but returns shortly after with some nuts that she gives to Miller. He eats the nuts and begins to hallucinate, allowing Octavia to free Lincoln and help him escape.
 * Day Trip

Miller watches Chacellor Jaha's Unity Day speech with the other delinquents. As the speech goes on, Miller makes a rude comment about it and asks someone to shut it off. Raven tells him to be quiet and he does, but brushes her off. Later on, Miller is seen drinking the moonshine.
 * Unity Day

Miller radios Bellamy that someone is approaching the gates to the camp. Later, when Bellamy arrives at the gate, Miller is the first to recognize Finn and Clarke, telling the other Delinquents to hold their fire.
 * We Are Grounders (Part 1)

Miller leaves the camp to head to the beach with the others to escape the attacking Grounders. He walks in the front of the group next to Drew and discusses with him what they're are going to do once they reach the beach. However a Grounder scout hiding in the trees attacks, throwing a metal object that strikes Drew in the head instantly killing him. Miller and the other delinquents flee back to camp taking Drew's body with them.
 * We Are Grounders (Part 2)

Once back Miller is placed in a foxhole with Monroe and Octavia. The Grounders soon approach the camp and Bellamy joins them in the foxhole where Miller informs him that Octavia ran off. When the Grounders finally attack, Monroe flees, Miller is hit in the shoulder with a spear, and Bellamy is knocked down. Octavia then returns to save them but in the process gets hit with an arrow, Bellamy then orders the wounded Miller to return to camp, while he takes care of Octavia.

Back at camp Miller informs Clarke that the Grounders have almost breeched the walls and he asks her if they can shut the dropship doors, however she tells him they need more time for Jasper to wire the explosives so he returns to the wall to attempt to hold off the Grounders. Eventually they do manage to breech the walls killing multiple delinquents. Miller then tries to convince Clarke who wants to help Bellamy and Finn who are engaged in a fight with Tristan to follow him into the dropship. Clarke eventually reluctantly follows Miller and they shut the dropship doors.

However, Anya managed to sneak into the dropship and attempts to attack but Miller strikes her in the head from behind and then him and some other delinquents begin to beat her. Miller tries to finish her off with his knife but Clarke stops him saying "they are not Grounders". Jasper then sets off the explosives obliterating all the attacking Grounders.

When the sun rises, Miller and the others exit the dropship and inspect the charred corpses around the camp. The Mountain men then knock them out all with gas grenades that are thrown into the camp and Miller is presumably taken back to their base in Mount Weather.

Bellamy Blake
Miller is one of Bellamy 's assistants and holds high respect for him. He is also loyal toward Bellamy.