Controversial Opinion: Yamato, the Yamato, should be a matronly older woman. Not mommy-like, but matriarchal.

*I looked it up in the dictionary, I didn't mean wifey. I meant "matriarchal" all along. Unless you don't mind.

Listen, we have seen boobs explode this year. Like, nuclear-grade explode in size. Also, we have had the first (slightly) chubby kansen.

I think, that the legendary ship should be a mature woman of authority, hardened, and strict. Wearing traditional japanese clothes or military clothes, but with the design denoting a high-status.

Not a mommy. That's what Fred and Musashi are for. She is a no-nonsense commander.

From there, your pick: dominatrix; or hard shell and a soft core; or closet sex beast.