For a colourful, big cast I don't think it is bad to devise most of them as clear-cut 'clichés' when it can definitely work for the sake of the events flow in good paced fun. For GuP girls, many instances of activities from their daily lives as underdog club members pass by, on where we could definitely know what to expect from any of them as characters but in which the timing of delivery and sum of the parts (see stereotypes) that represent each one of them in a friendly cohesion while in strange diversity made the moments all the more endearing.
We re-visited topical things present on 'sports genre' series too, but seen through the prism of silliness that such a contrast of a setting between violence and delicacy made, to the point that it played in their favour... in the same effective way the very defined and static personalities helped to create an accentuated contrast too on how the cast interacts for any given circumstance they are thrown at as part of the game. Is that simultaneous hot-pot of cute, silly, fairly referential and clever dialogue along the passion of achieving little-by-little a common goal what in my opinion brings a much more accomplished end result than whatever any sidestepped analysis of their individualities could infer.