As Zac08 has mentioned, we can try the one or both of the following themes
1) tourist in a nice sun-dress, etc with a nice bright brolly.
2) a nature-lover - a kaki-pants with a similar coloured top, a pair of binos, cap.
No. 2 is a variation to the theme I suggested. As for the theme you suggested
3) catgirl (we got the ears part but what about the costume/attire?)
it may end up with a cosplay concept, or a cute kitty kind of concept (ur cheeks will have black "whickers" drawn on them, originating from your nose/nostril). It can still be done at PRP, but definitely not at the mangrove boardwalk, but more towards the beach/park/playground site.
Since we are near the beach, we can also try the overused theme of
4) beach-goer - the attire is your choice
Or, we can try the
5) sporty theme - probably in running attire or even cycling togs
5 themes to choose from. Or do you have any specific idea in mind? If so, please let us know.