Who's She-Ra?

So my neighbor friend Lisa and I went to the new Halloween store by the Office Depot yesterday, because we love Halloween, and because Lisa was still working on her costume. She is going to be She-Ra. When we were at the cash register with a sword and blonde wig, this was the dialogue:

Lisa: If I worked here, I would ask everybody "What are you going to be?"
Cashier guy: So who are you going to be?
Lisa: I'm going to be She-Ra.
Cashier guy: Who's She-Ra?
{a stunned silence ensues for approximately ten seconds}
Lisa: {turns to Rachel} This guy just almost got himself punched!
Rachel: {laughing} He probably isn't old enough. {To cashier} How old are you, boy?
Cashier guy: {obviously surprised age is an issue, presumably because Lisa and Rachel are both young-looking and hot} Why? How old are you?
Lisa: Twenty-six!
Rachel: {still laughing} Twenty-four!
Cashier guy: Oh, I'm nineteen.
Lisa: {scornfully} Nineteen! Geez.
Cashier guy: So, She-Ra...?
Lisa: You know He-Man?
Rachel: She was his sister.
Lisa: {sounding indignant} She led a rebellion.

After this it gets pretty boring, but the guy claimed he would look it up on Wikipedia. Anyway, it was a humorous exchange, even though it makes one feel a bit old. Any of you people not know She-Ra? I suggest you visit the link, before you get punched.