Default characteristics:

shy1ily, 1girl, ahoge, animal_ears, streaked_hair, blue_nails, body_markings, fish_tail, multicolored_eyes, multicolored_hair, 

Alternate, mostly unused:

black_hair, pink_eyes, purple_eyes, red_eyes, white_hair, blue_eyes, heart_eyes, 

Alternate, mostly unused:

anal, sideboob, large_breasts, medium_breasts, ????, bare_shoulders, 

Outfit:

blue_bikini, blue_choker, blue_sailor_collar, blue_skirt, thigh_strap, crop_top, gold_buckle, o-ring, o-ring_top, red_bow, see-through_shirt, short_sleeves, 

Outfit, mostly unused:

striped_panties, yellow_hat

Other:

from_above, from_behind, from_side, 1boy, evil, groping, laugh, ???,