I also wanted to know what is gua and what is it for. I thought of 'guard', maybe something related to being hit and keep standing. But I'm not sure, I didnt test it.
there is a way to sort by team. Rename the characters, putting a number before theyr names. So, for team 1 you get 4 characters and put a 1 before their names; for team 2 the same, etc. So when you order your student alphabettically, you'll have the listing of teams instead. + if you think it was useful
I beat the game quite easily with the bard and the warrior. Once you have some levels, so the bard have the speed up music, the strategy is simple: You gear your bard with the "swiftness" equip, so he gets a lot of speed; then he will act first. So, your first move is to speed up the bard himself. So, because he is really fast, he will act again; then you speed up the warrior. With the warrior you can stun your enemies or cleave them, while the bard buffs with critical up and evasion up. When the speed up ends, cast it again. This way you will have a lot of turns and the enemies very few. Its easy to beat the game this way :)
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Happy to know you beat the game :D nice strategy too! xD