Every girl in this series has an issue
Hitamuki - Ditzy, attracts the sexual attentions of males of every species, clumsy to a fault
Medeina - Underaged, Poor Stamina
Tokishikko - Lazy, Pisses on you like R. Kelley, Friendly fire, Poor Stamina
Hanabata - Berserker, Friendly Fire
Enoma - Currently Married
Eshune - Underaged
Reya - Squirrel
Raya - Squirrel
Noma - Dude
Looks like his best choices are Medeina and Eshune once they grow older. Followed closely by Noma.