Always use

ChirpMGQ, 1girl, harpy girl, monster girl, brown eyes

Since she usually wears skirt, it's not always shown, for full harpy body add: 

warm brown feathered hips, feathered tail

Sparrow outfit:

ChirpMGQ, 1girl, harpy girl, monster girl, brown eyes, sparrow costume, hood, hooded cloak, feathered cloak, long cape, tied cloak, tied cape, costume, green patterned crop top, cream wrap top,  layered wrap skirt, purple and yellow sash, hip bow

normal clothes

ChirpMGQ, 1girl, harpy girl, monster girl, brown eyes, green patterned crop top, cream wrap top, layered wrap skirt, purple and yellow sash, hip bow

ALL TAGS (not always necessary)

ChirpMGQ, 1girl, harpy girl, monster girl, short brown hair, brown eyes, light brown lower torso plumage, cream feather tips, dark brown wing feathers, warm brown feathered hips, wing arms, bird legs, feathered tail,talons

For sparrow outfit

sparrow costume, hood, hooded cloak, feathered cloak, long cape, tied cloak, tied cape, costume, green patterned crop top, cream wrap top, long skirt, layered wrap skirt, purple and yellow sash, hip bow

Normal clothes

green patterned crop top, cream wrap top, long skirt, layered wrap skirt, purple and yellow sash, hip bow

All tags

ChirpMGQ, 1girl, harpy girl, monster girl, sparrow costume, hood, hooded cloak, feathered cloak, long cape, tied cloak, tied cape, costume, green patterned crop top, cream wrap top, long skirt, layered wrap skirt, purple and yellow sash, hip bow, bare midriff, light brown lower torso plumage, cream feather tips, dark brown wing feathers, warm brown feathered hips, wing arms, blue feather necklace, gold bracelet, short brown hair, brown eyes, bird legs, feathered tail,talons

I suggest to remove cream from the input sometimes, it can be weird.