Kai Smith

Kai Raymond Smith is the First Red Ninja and a Master of Fire. He is the son of Raymond "Ray" and Maya Smith, older brother of Nya, husband of Skylor, and brother-in-law of Jay. He is one of the founding members of the Ninja and former wielder of the Sword of Fire.

He is the father of Rufus, Ruby, Cerise, and twins Agni and Agnimitra Smith. He is also the maternal uncle of Lazuli, Sapphire, twins Cobalt and Azure, and Neil Walker.

Trivia

 * Near the end of Chasing Memories 2: The Twists of Fate, Kai was revealed to have complete heterochromatic eyes, a fact he hid with colored contacts.
 * He was the last of the Original 6 to retire, after 60 years of service, more than twice the average of all other Ninja service records.
 * He didn't retire until his oldest child and successor Rufus was 43, making him the oldest member to officially join the team at time of recruitment, beating Zane by 8 years (he was 35 when he joined the team).
 * Kai only retired because Lloyd, Wu, Garmadon, Misako, and current team leader Erica all ordered him to step down.
 * He is Hispanic and white on his father's side and Filipino on his mother's side.
 * He's the only Latino of the Original Four.
 * His and Nya's powers were trauma-locked until they were trained by Wu.
 * Zane calls him "Peacock" because he's a show-off most of the time and loves the attention.