Some time ago I bought a used Daisy Rock Siren for someone.
Siren:
It's a surprisingly decent guitar that's held up well. It's too small for me (I did try it a few times) but for a woman it works just fine. Nothing about it really screams cheap or anything. Also the good thing about Daisy Rocks are that they're uncommon so she'll have something that it's unlikely a bunch of her friends or other musicians will have. Go the extra mile and get an engraved truss rod cover with her name on it or something.
This is a very good looking pink guitar. Whoever get's this as a gift will definitely keep returning to it. The other guitars suggested, IMO, looks to be more suitable as a secondary guitar. But this Solar makes a bold statement.
Um..he needs a non trem equipped pink guitar under 500 bucks for a chick that just strums some chords and dicks around. I think some of you think he's shopping for a guitar for you.
She doesn't have any actual specs picked out and seems to just want a cool fashion accessory which to me says buy something cheap and if she really takes to it she can get something better down the line.
I'd go with the Ibanez if she wants something "serious" looking or the Daisy Rock if she just wants to live out some Josie & The Pussycats fantasy. Both options are cheap and hit above her skill level so she's got something to grow into should she take it more seriously