I guess cause there was nothing very Gali like about her aside from her color. Like, if you dumped grey paint on all the mistika, and told someone who had never seen them before to guess which toa was which, they probably wouldn't be able to find out. Like, what does having a gun have to do with water, nothing. Nothing about her is linked with being a toa of water except the blue on her. At least, that's why I don't like her a ton.