I played your demo and I had problems trying to know which character I'm in control. There's no visual clue for that neither. Maybe you can put a colored circle bellow the character in control like this edit I made:
With something like this, its visually clear which character is at your command. There are other ways like for example a triangle in the head, but as long as it is something that pops out visually, it will be fine.
Gameplay wise, the combat feel too fast, but maybe it's because I'm not used to this type of RPG. I read the story premise on the game page, and I like the idea of a RPG in a city/school setting.
For the moment, I don't have more things to say, I hope you keep working and polishing your game. Keep the good work.