Purple Pseudos are cool. I have one as well. But they tend to be quite bold. Mine can stand up to anyone else in the tank. And when I had a net in there with food inside trying to catch a few fish she'd go right into the net, grab the food, and leave. (Too bad I wasn't trying to catch her!)
) For a 10g tank, and considering how aggressive Purple Psuedos can be, you need to get someone either equally aggressive or totally different from it. Perhaps a Cardinal (not aggressive, but totally different). Or one Clown (who could stand up to her.)