K-Toscs

K-Toscs was a young agent of the Division, referred to as a "child" in comparison to En Sentac by.

Shortly after going through "psych-resistance training", he was assigned alongside experienced agent En Sentac to check the containment of Swarm in the containment chamber at the "remnants of the Burnished Rage battleground". He looked on helplessly as the containment measures failed and Swarm consumed En Sentac. After freeing himself, told K-Toscs, "Your time is over", and caused him to combust into ash with a simple brush of his hand. (TV; The Halloween Apocalypse)

Behind the scenes
No pronouns are used on-screen for En Sentac or K-Toscs, but the script for The Halloween Apocalypse used singular they for En Sentac and he/him pronouns for K-Toscs.