Sea Serpent

Unlike the first member of my troupe to visit the pool party, Scharlitte loves her some sun and social interaction. She's also a pretty adept swimmer, as she can use her tail to propel herself through the water without having to worry about silly human legs getting in the way (however, her underwater silhouette can catch other guests off guard if they weren't already expecting a ten-foot serpentine thing slithering through the depths). 
She might have picked the wrong moment to surface - but then, random objects flying through the air tend to seek out Scharlitte's head, so what're you gonna do. I'm sure she'll be up and making friends as soon as the volley ceases.