Penny was my first, before I knew I was also a woman. She is bookish and shy, and loves others and cares for children. She has a rough life at home, but still deeply cares for her mother.
She has a crush on Sam, but barely talks about it. She doesn't talk about much of anything, actually, until (!) you get to know her. Then she talks about everything on her mind so freely.
She likes to be alone with you. Her 10-heart scene is so sweet!!!
Also her spouse room is great! It's hard to not marry Penny every play through.
So yeah, Penny.