HAS to be Molly for me!
Every time I start up the game or have been afk for a while, she always pings me and gives me free stuff.
Granted, it isn't stuff I necessarily want, but she is just super freaking sweet. <3
Flurry is close 2nd.
Rizzo. He often told me he watches this program tells him to give present to the first person he meet lol else is Nibbles and Bunnie when I reject buying something from them they give it to me forfree instead =x Graham another side, often the one send me mail with gifts and mushy letter content LOL
Diana! She doesn't give me the most stuff, but she def. gives me the most expensive stuff by far i.e. of the top of my head she's given me a throne and a moon before!