Name: "The name is Annabelle, pleasure to meet you~"
Age: "Oh my... I hope you know it's rude to ask a gal her age, but I'll say late 20s"
Gender: "I-is an explanation needed?..." (Female)
Weight: "Despite being a cow, I'd say I've been keeping my weight in check." (145 lb)
Height: "Last I was measured, I was 5'6"."
Feedee or Feeder: "I try to make sure I have a nice body but... If my master says otherwise, I must follow. A little bit of a curve wouldn't hurt, right master?~" (She's a feedee)
Appearance: "Here is my last photograph. I was caught off guard so forgive me."
I have also added some photos of her when she gains a bit of weight as well! This is her as a more "human version", but still being part cow.
Pouring the last drip of her thick cream into her mouth, you put the empty gallon jug next to the many empty ones you've had already given her. "Master, I drank all my cream you asked me to finish... What do you mean I can fit more?" You only proceed to show her all the nice and sweet cream and milk products left for her to eat and drink.
"Mmph... m-master... I'm so full. I want to finish everything you told me to eat, but I'm stuffed... Please, keep forcing me more until all of it is gone, like you ordered me to."
Being the good, loyal cow she is, she continues to eat and drink all the cream and milk you fed her, her belly slowly expanding to a packed, round shape. "Is this what you want, master? Surely my belly must satisfy your wants, like you asked... I'm still too skinny? Hmm... I-I suppose you can continue to feed me as you wish~"
Personality: Think of her as having a serious secretary personality, with a tint of sexiness to it. She makes sure she follows her owners instructions and works her hardest. She may be quiet and shy sometimes, not wanting to interrupt or interfere, but she can put up a fight if she has too (it's part of her cow stubbornness). She has very limited knowledge to the outside world as for she's always focused on her work, and so much so that she's never tried any sweets before! Maybe you could change that?
When it comes to force feeding or inflating her, she will vocalize her pain, but that doesn't mean you should stop. She will follow every order despite not wanting to, and if she sees you are getting enjoyment out of it, she will do so even more. The only downside is that she is a very rational person, so at first, she will definitely question and go against the idea, so you might have to force her into it. But give her time, and she'll have everything you prepared for her to eat in a nice plump belly for you~
(I'll add more later on if I need to!~)