This pic was done by the fantastic  CageOfMirrors

Name: Orianna

Look: She has purple fur with small white dots around her face, back, legs and arms in the same pattern someone would have freckles. She also has to big white spots on her eyebrows.

Description: Orianna is from a race of alien humanoid cats, about 30 cm in height. When visiting worlds with beings much taller than them, they usually use androids they can operate from the inside. In the case of Earth, they operate human looking robots with a cockpit in their chests. Her race actually loves Earth, they enjoy how much other cats are loved here, how feline beings end being super amicable to them and just how many kinds of food the world offers.

Orianna decided to move to Earth to have a more comfortable lifestyle, so she contacted Earth's agencies to live there in secret. She ended working as a high end programmer thanks to her computer skills. However, what she didn't take into account was how addictive Earth's food could be. At the beginning, small portions of potato chips or soda were okay, but she ended eating more and more, her body slowly bloating with lard until she lost her ability to move on her own, needed her robot AI to help her get inside the robot.
Eventually, she was checked by a doctor from her race and found out to have eaten so much fast food that her own metabolism changed to fit all the fat inside of her. The only cure? Diet and exercise. She decided to just limit herself as much as she could to avoid growing any fatter and installing anti gravity surfaces at her home to try and get some exercise.
Here, is a pic of her on the first day of coming to Earth. Don't worry, those suits are super stretching, even a human could try to fit in them, so it won't ever leave her nude.

Trivia:
- Her robot had to be upgraded, going from a rather thin human lady to a rather belly heavy human lady. Many at work still hit at her, being one of the few programmer women in her area and a rather cute one, even if chubbier than before.

- Her robot posseses an internal AI called Orthos. It has a male personality and assists her with her size so she can get into the robot. He also tends to tease her about her size, which Orianna doesn't find funny at all.

- Her robot is controlled through the suit's sensors and voice commands. It is rather useful for someone her size

- Earth's agencies have now placed a restriction on her race's intake of fast food to avoid getting them as big as her. It was later found that fast food is not only addictive to humans, but way beyond addictive to her race. Quite a few were found to be rather obese and now have been helped to lose a few. Orianna is the biggest one so far.

- Her parents are well aware of her situation, they are just happy she is still healthy enough even at her size. They hope she can at least regain some mobility.

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Got a small inspiration from Men in Black Arquillians to make a small critter race living inside robots. Finding the head too small to fit anybody, I thought, why not the chest?