Either way, the anime team ran away with the subtext, to point of it being 'writing on the wall'. Others dismiss it as Sui-Feng either fangirling over her, or believe she only looks up to Yoruichi as a 'big sister' figure (mainly by those who ship Yoruichi with Urahara). Many believe that she's in love with Yoruichi and cite her emotional breakdown at the end of their fight, along with the time she tried to take pictures of her naked note as her part of a project for the Shinigami Womens Association as evidence. The true nature of Sui-Feng's attachment to her mentor, Yoruichi, and her sexuality, in general, is an often debated subject.He also seems rather resentful and angry at most of the females in the series. He dresses in very flamboyant, feathery clothing, and is constantly seen with roses (he has a freakin' bath filled with them!).
However, every single character in the series notices his romantic obsession with Train (other than Train himself).
It's not the crossdressing that makes her suspect, but the fact that her charge is a very openly bisexual hedonist who sleeps with most of her servants, male or female - all of which are quite happy with the arrangement.