Namua

is a former shinobi and ex-convicted criminal.

Background
Namua was once a shinobi who killed and stole from whomever he could in a desperate desire survive. At some point, he was captured and sentenced to the Northern Penitentiary. Sometime after getting out, while starving, a poor old man who had only a little bit of food shared it with Namua. While Namua was initially planning to kill the man for his remaining food, but hesitated at the genuine kindness in the man's eyes. Inspired from this, Namua decided to take a new path free of selfishness.

Personality
Once, Namua was a cold-hearted and self-entitled man. He killed many people for his own gain. By his own admittance, his actions steamed from fear and paranoia of being killed himself. However, upon meeting an old man who showed him such selflessness, Namua came to reflect on all his misdeeds, and since devoted himself to ascetism. Since then, Namua has disciplined himself to become very composed, openly admitting to his own mistakes. He takes his time held captive calmly to instead meditate. He is also very compassionate, working to help others escape in their impending demise and likewise disgusted at other people's lack of compassion.

Appearance
Namua is a tall, solid-built man with a bald head and pale skin. He has two, grey ring tattoos around his right bicep from his time in prison. He is dressed in a white shirt and pants with green robes. His shirt sleeves are secured by three green band each, a dark green sash around his waist, and his legs are bandaged with grey sandals.

Abilities
Namua is a former shinobi. He is shown to be quite strong, able to hold back a crushing ceiling for a period of time.

Labyrinth Game Arc
While on the Thunder Train, Namua and all other passengers slept and found themselves detained in a secluded room. Eventually, their captor, Ōga, revealed himself, explaining how he would put them through five experiments to test their ability to avoid death before being allowed to leave his maze. The first test involved escaping a brittle, collapsing platform on a chasm to a higher, safe ledge. He criticised Batta when the Wind Release she used to save herself further destabilised the platform, which she ignored. He helped Boruto take people up the ladder improvised by Kiseru, clearing the first experiment.

For the next experiment, everyone was given a candle that symbolised their lives, if it went out, they'd die. When the group that agreed to work together came to a closed gate, Namua and Kiseru trusted someone else with the lanterns containing their candles to help Boruto force open the gate. In the next room, he along the other shinobi helped protect the non-shinobi from a dust storm while they protected the entire group's candles. Near the end, they had to take a slow-moving elevator, and realised that their candles wouldn't last the entire ascent, Ōga intending them to steal each other's candles. Boruto exploited the exact wording of Ōga's rules to make one long candle with the remains of everyone else's, shared by all, so they all survived the ride, clearing the experiment.

While waiting for the next experiment, as others began talking about their goals should they escape, Namua plainly said he had no goals. Rokuro noticed his prison tattoos, to which Namua revealed his sinful past. When Ōga returned to begin the next experiment, the "Collapse" test chosen. The group was teleported to another room, where soon the wall began to fall on them. When discovering only a few chambers for people to squeeze into to escape being crushed, Boruto realised that the floors weren't completely solid. Namua helped Boruto to break through the floor. Ultimately, Batta was convinced to help, who was able to find the weak point in the floor, letting Boruto break through to save everyone. With the test cleared, everyone was returned to the original room.

Trivia

 * His name could be a shortening of Namu Amida Butsu (南無阿弥陀仏), a Buddhist prayer for rebirth in Sukhavati, the Pure Land of Amitabha.