ooh, a toughie...
I am looking forward to what the MODs have to say on this.
My two bits:
If you never mention her age, then the only people that will know she's a minor are the people that watch the show. BUT, they are making a judgement on this based on a caharacter. If a new TV show features a 30 year old woman, but the show has only been on the air for a few weeks, is the character 30 years old, or is the character a few weeks old?
The woman who voices Kim, maybe she's 30.
If you do mention her age, and people DON'T know it's a cartoon, then you will be labeled a child pornographer, even though your mea culpa might be "but she's NOT REAL!".
It's a brain twister.
-w