Luke Cunningham

Luke Cunningham, also known as The White Mask, is a member of the Sons of Garmadon. He is an avid bike rider, often wearing a tight sleeveless vest with a black helmet and shoulder armor or a white Ninja suit with a biker helmet.

The Mask of Deception
Luke was one of the Sons of Garmadon that infiltrated the Borg Tower. He was the one that accidentally triggered the alarm, and was ultimately left behind by Mr. E in order to escape from Lloyd. He was then arrested by the police.

The Oni and the Dragon
After being arrested, Luke was brought into the interrogation room in the police precinct, where Cole and Zane use the Tea of Truth to interrogate and make Luke utter the truth.

When Cole accidently mixes up the regular tea and the Tea of Truth, it causes him to utter the truth instead, causing Luke ask him ridiculous questions as well as to get more information about the Ninja. Later, they then set for a Sons of Garmadon hangout Luke accidentally mentioned.

Dread on Arrival
Prior to "Dread on Arrival," Luke was released from custody. As he was patrolling the grounds of the Temple of Resurrection at the Royal Palace, he discovered some scuba gear. As he was about to inform one of the generals that there are intruders on the premises, he was knocked out by Nya and dragged behind a bush. He was presumably found and arrested by the police.

True Potential
Luke was freed from Kryptarium Prison by Harumi and the newly-resurrected Lord Garmadon. After turning the prison into a bunker, Luke served as a lookout near the prison entrance, observing Lloyd and notifying the rest of the Sons of Garmadon of the Green Ninja's approach.

Ninjago.com Description
''Luke is a member of the Sons of Garmadon, a ruthless biker gang devoted to its mysterious leader, the Quiet One. Determined to steal the powerful Oni Masks, the Sons of Garmadon may be the most dangerous threat the ninja have ever faced.''

Trivia

 * His Ninjago.com page and description were deleted a few days after they got published for unknown reasons.
 * His hairpiece is from another LEGO theme called Exo Force. However, it was only released in green, and Luke's is white with a black strip.