she's made out of a special kind of soft caramel which is extremely stretchy, this allows her to pump herself up to become an immense balloon, but she does have a limit, fortunately, she will regenerate immediately after being popped.
The downsides of being made of sugar is not being able to touch water (she'll melt away) and eat anything but sweets.

she's got a magically imbued Makarov (she can make it take different forms) which shoots candies that causes the target to bloat up fatter with each bullet (these won't have any effect on her), this pistol doesn't need to be reloaded, but only she can use it to its full potential.

she's very kind and sweet to others, and also very positive and cheerful, likes to hang out and do whatever can make her happy, such as grab a pump and inflate herself in public places for no reason at all. Pretty driven by this constant desire to get herself as big as she can.

she lives with her roommate Kvolik, with whom doesn't have a particularly good relationship, but neither is that bad, and only knows Zolotoy by name. She doesn't breathe, but can't talk without air.