There are currently six levels of rarity for the Harem Girls. Girls in rarity 1-5 are either three or five star girls. Girls in rarity 6 are seven star girls.
1. Starter Girls (7/12)
2. Common Girls (39/34)
3. Rare Girls (111)
4. Epic Girls (217)
5. Legendary Girls (201)
6. Mythic Girls (2)
In January 2021 HH is going to introduce One Star Girls, the 1* girls are counted as "common girls" for game purposes.