Is there multiple endings or what not? I kind of want to see what happens if for some miracle I manage to kill the mid-boss(?).
I'm guessing there is nothing but I don't have the motivation to find out either.
For a game about Training Lea, She is useless even at the end. There is absolutely no satisfaction of seeing your units getting leveled, because they dont. There are all weak and only good for meat shields, probably not even meat shields since its game over if one of your main units die.
If you get the healer, just let Vilo go rampage, make himself a big target and let all the enemies kill themselves attacking him. Then go back to heal.