The 1987 versions of Leonardo, Michelangelo, Donatello, and Raphael, in Pony, and able to do NSFW. As well as some of the other characters, here are the prompts:

basic turtle: <turtle name>,tmnt,<color> eyemask,1boy,black eyes,source cartoon

TMNT cartoon style: cartoon still

april: april o'neil,yellow jumpsuit,large breasts,cleavage,black eyes,lips,makeup,lipstick

shredder: shredder,mask,helmet,armor,ninja,1boy,cape,mask,shoulder armor,pauldrons

irma: irma,brown hair,ponytail,1girl,blouse,skirt,glasses,breasts,long sleeves,black eyes,red-framed eyewear,short ponytail,purple skirt,turtleneck sweater,wristwatch

splinter: splinter,1boy,fangs,purple kimono

bebop: bebop,red vest,jewelry,black pants,pauldrons,mohawk,sunglasses,earring,nose ring,tusks,1boy,source furry,mutant

rocksteady: rocksteady,camo tanktop,brown pants,goggles on head,helmet,1boy,mutant,source furry,solo,boots