Nia raised her hand. "I've only ever seen them been referred to as 'River Children' or -" She paused to think about the pronounciation. "Gataro?" She flicked her hair back over her shoulder from where she'd been fiddling with it. "Apparently though there is a Pokemon called Psyduck people muddle with Kappa." She shrugged, before offering a further explanation. "A Muggle game thing..." she added, wrinkling her nose.