2 Lesbains journey off to fight the evil demon overlord

Yes they are dating

The game is topdown but the battle system is in the 2D Platformer visual style

The battle system is really similar to the Mario & Luigi battle system in that you can always avoid taking damage, you can increase the strength of your attacks by pressing buttons, & there are Dual Attacks which are just Bro's Attacks

Also, instead of being locked in place, you get to move around a little battle arena