Yuma Lau is encountered in a hallucinatory sequence within the 'Mouth of Madness' mission. This fight is less about direct combat and more about navigating a disorienting environment while fending off her illusions. Yuma herself is often invulnerable until specific conditions are met. Look for environmental cues or specific actions you need to perform to make her vulnerable. She will summon waves of enemies, so a good assault rifle or shotgun is recommended. Conserve your health syringes and focus on the objective to break her spell. Patience is key in this unique boss fight.
