Dominic Sorel is the youngest to be second lieutenant and Dewey's subordinate. He is assigned to Anemone to tend to her needs and monitor her physical and mental condition. It's never explained why Dominic was promoted so fast, especially given his occasional naivete. There are men in the military far older than him and yet of much lower rank, who often have trouble obeying his orders. Dominic is also aware that commanding officers give him a hard time following his orders for Dewey as they think he's still a kid.