An agent of the Department of Temporal Investigations who visits La'An Noonien-Singh after her journey to the 21st century and orders her never to speak of it.
Agent Ymaly appears at the end of the second-season Strange New Worlds episode Tomorrow and Tomorrow and Tomorrow, played by Allison Wilson-Forbes.
La'An has been thrown into an altered history by a dying stranger in a grey suit, travelled to 21st-century Toronto with another timeline's James Kirk, and stopped a Romulan operative from killing the young Khan Noonien Singh. When she returns to her own quarters with the timeline restored, Ymaly is waiting for her.
The agent thanks her for repairing the damage, takes back the time-travel device, and explains that the department polices such incursions. She instructs La'An to tell nobody what happened, not even those involved. Left alone, La'An calls the real Lieutenant Kirk simply to hear his voice, then breaks down.