I actually made a Chihaya/Haruka/Yayoi family for showtime when it came out, although i've since uninstalled my sims3 a few months ago to make space for loads of visual novels. This was before I watched im@s anime so its mostly based on my impressions from playing im@s sp and reading wiki (shouldn't be too far off, after watching anime it still looks fine to me).
Chihaya
Virtuoso
Artistic
Perfectionist
Workaholic
Loner
Possible substitutes are Shy, Technophobe, Disciplined, and maybe the Brooding added in supernatural.
Haruka
Clumsy
Star Quality (I would give Natural Born Performer but it conflicts with Clumsy)
Outgoing
Friendly
People Pleaser
Yayoi
Hyperactive
Excitable
Frugal
Family-Oriented
Natural Cook
It was kind of funny yet sad, while haruka and yayoi were best of friends chihaya somehow could never get along with them.