only tomoe uses waka (若) and every other subordinate uses waka sama. The tl i was working with suggested we keep it as waka instead of translating to young master. Since using young master for both waka and waka sama was not properly representing Tomoe
its a bit unnatural to use but unless there is a proper term to exactly represent tomoe's edo-period aesthetic, i think it should be better to stick to waka till then?
No, you should just stick with "young master". The fact that his followers all call him "young"—to his annoyance—is a plot point. Switching to "waka" loses that context for most English speakers. Worse, there is no real gain from making the distinction between "waka" and "waka-sama". An English speaker isn't going to notice unless the characters respond to it immediately—and these don't. Besides, Tomoe already has plenty of archaic speech markers in translation to distinguish her, so trying to indicate this particular one is redundant.
Basically, this is just a bad trade-off. I'm not surprised that a native speaker would want to keep the distinction, but it really doesn't translate well.
If you
really want to keep the distinction, you could try to use an alternative English term for Tomoe to use, but I'm dubious about any I can think of. "Boy" is too disrespectful; "Child" is too unfamiliar; "Son" is closer, but doesn't work with him being her romantic interest; "Kid" is not bad, but conflicts with her archaic speech. Maybe if you dig around a thesaurus and English etymology dictionary, you can find an archaic term that works.