I'm not sure this counts as gender bender seeing as Crona's gender was never actually revealed (that I remember).

Base +4, Spisepinden +6

Chrona is a gurl, Medusa says it in the manga 娘 musume daughter, aaaaand

BOOBS

Base +5, rockarolla -4

in the jap anime/manga its a he, in the eng anime/manga its a she, its beacus in the west its bad to crossdress, or not moraly right, something like "guys cant look like girls beacus its makes them gay, and everyone hate gay ppl. we cant lett our kids watch a guy dress as a girl or it will make our kids gay, and they will get hated on". in some anime/games herms and crossdressers have ben swaped to girls like poison from street fighter

Edit: @ shadow king: they do? well then hes just a girl in the western manga

Base +6, MightyHonks -8, Grumo2frui -6

Chrona and her(?) symbiotic sword have been prime hentai material since their incarnation. Can't believe it took this long for one to pop up, glad it finally did.

Base +7

@ppkman111: but in the english anime (not sure about the manga) they use male pronouns in reference to Crona.

Base +4