Derived from the wiki:

"Yatta is a fun loving, candy eating, piñata acrobat! She is always there for her two closest friends Blot and Looey! Together the three come up with fun acts to perform!"

Yatta is a crazy, generous, hyper, and loud Toon, always putting her friends in a positive light and thinking "highly" of them. Yatta is jittery and hates keeping still on top of being somewhat impatient. She also doesn't fall easily for tricks. Additionally, Yatta is more attentive and cleverer than she initially appears. However, her behavior can make other Toons concerned for her. Yatta is obsessed with candy; it is quite likely that she eats candy excessively, She also seems to come off as highly ignorant- at least of some social conventions- as some Toons show dislike on how she suddenly pops up in conversations without warning or occasionally scares them with her habit of crawling around in Gardenview's vent system.

Her voice should be loud, high pitched, and EXCITED!! maybe a little..too excited.. 
Pinkie Pie (MLP) may be a good fit.