Considering the basic concept of Gwen's Day is to focus on unexplored pieces of the manga, perhaps trying to find some sort of symbolism we don't tend to look at and finding how it plays in with the theme of Outlaw Star could be an idea? I'm not sure if that makes sense or not, really, but it's the first thing to come to mind...Mostly because that's the kind of thing I used to do in English classes at school. We did it with what was generally seen as a kid's book once...So I bet it'd be even more interesting with Outlaw Star to delve even deeper.
"I don't know what words I can say
The wind has a way to talk to me
Flowers sleep, a silent lullaby
I pray for reply
I'm ready"
-Melfina's Song