After some final thinking, I'll be adding these lovely individuals. Afterwards no more females will be in the harem.

Zoe Drake ( dinosaur king):

( age will be 16 when she appears in season 2)

Ursula Lillis ( last name given, dinosaur king):

Athena Monde:

( will be 17 when she appear in season 3)

Also special thanks to @Spenceryoo2005 for giving me the suggestion for Athena.