is a Mexican Luchador (professional wrestler) signed to WWE, where he performs on their NXT brand and on the cruiserweight-exclusive 205 Live brand. Previously, he worked under the luchador ring name Último Ninja while wrestling throughout the Mexican promotions. is a Mexican Luchador (professional wrestler) signed to WWE, where he performs on their NXT brand and on the cruiserweight-exclusive 205 Live brand. Previously, he worked under the luchador ring name Último Ninja while wrestling throughout the Mexican promotions. On August 23, 2018, Humberto Carrillo started competing for the WWE and signed his official contract on October 18, 2018, along with other recruits. Prior to that, Carrillo has made an appearance on the September 19 edition of NXT against Jaxson Ryker in a losing effort. On the December 5 edition of NXT, Carrillo would make his televised return when he teamed with Raul Mendoza in a losing effort against Steve Cutler and Wesley Blake of The Forgotten Sons.[6] On the January 16, 2019 edition of NXT, Carrillo competed against Johnny Gargano in a losing effort. On the January 15, 2019 edition of 205 Live, Carrillo made his main roster debut when he answered the WWE Cruiserweight Champion Buddy Murphy's open challenge in a losing effort. Despite this, General Manager Drake Maverick revealed after the show that Carrillo has joined the 205 Live Roster and will compete at the WWE Worlds Collide Tournament at the Royal Rumble Axxess. The following week, Carrillo scored his first win on the brand defeating Gran Metalik. On February 5, 2019, Carrillo competed in a fatal four-way elimination match to determine who would challenge Buddy Murphy for the WWE Cruiserweight Championship at Elimination Chamber, which Carrillo lost.