>>94283832She's 14, not 4. It's a lot better than a fake cutesy voice.
After the first few episodes Eden eases into the role and her delivery starts to sound a lot more natural, and as the show broadens later (especially into Season 2) her range really comes out.
From an interview:
>>What was the problem?>I think it had a lot to do with my lack of confidence. Star was also the first cartoon character I auditioned for that allowed me to be me. They could see my potential, even though I was really stiff in the first few episodes. Now I cringe because I could have been so much looser. Around episode 5 or 6, I was in a recording session and just couldn’t get this one particular line to come out right. It wasn’t funny. It wasn’t anything. And I was really struggling and messing myself up. So [the director] finally said, “Eden, just say the line the way you would say it. Bring that to it.” And it was like a light bulb went on. I realized I didn’t have to create some BS character. I was, like, “Ohhhh, I get it. This is me!” 
