As Hemmer grew more frustrated by the other crewmembers' insistence that they were characters from a storybook written by Benny Russell (Avery Brooks), he ran into Dr. M'Benga (Babs Olusanmokun), who also remained in his right mind.

Source: https://screenrant.com/strange-new-worlds-hemmer-best-surprise-character-why/

M'Benga and Kirk, at least, must survive because both characters are alive by the time of Star Trek: The Original Series.

Source: https://screenrant.com/star-trek-strange-new-worlds-season-3-bridge-explode/

M'Benga surely believed in "the cause," or at least that a galaxy dominated by the Federation was the better choice.

Source: https://www.cbr.com/mbenga-strange-new-worlds-protocol-12-klingon-war/

While it might seem unusual for a doctor to be so skilled in hand-to-hand combat, season 2 premiere "The Broken Bow" revealed that Dr. M'Benga served on the front lines during the Klingon War alongside Nurse Chapel (Jess Bush).

Source: https://screenrant.com/star-trek-strange-new-worlds-mbenga-fighting-doctor/