"Sons are transformed into fathers, fathers are transformed into sons; women are transformed into men, men are transformed into women. Such transformations cannot take place directly, but, after marriage, sons and daughters are born; is this not transformation?" (Ena "Hanunue" the Order, 1958)
... wait, wait. hang on. if:
Sunday's arc in canon is partly about her moving on from Sundayism -- formerly Sunday's unique branch of Revisionist Orderism (not a very practical one. I mean, it's already debatable how Marxist Orderism is, but if Orderism is already not Marxist enough, then Sundayism took it a large step further and became extremely un-Marxist by taking after the un-Marxist aspects of Orderism while leaving out the Marxist aspects of Orderism);
and that development was partly shown through Sunday temporarily taking on the form of a woman while in disguise as a wanted fugitive;
which, as a plot element, very well might've been a reference to the "Ena" quote above (it's extremely likely because the entire Penacony arc references the exact same text so heavily)...
Sunday's canon growth arc being transfem-themed IS actually sort of verging on the intended point all along?