Plot of dark urge: 

you begin as a banished angel to limbo with the goal to work your way back to the heavens. you'll presume to be the heavens and the voice will test your morels, asking you to kill monsters. That voice will go on to make you do more acts that test your morels such as defeating innocent monsters.manipulate you and its your choice to believe them or not, by choosing to believe them the story automatically gets harder to progress in leading you to face this voice turning out to be the embodiment of evil, the demon king himself. The soals your spared will aid you in the fight against the final boss and the ones you killed will be forced to fight against you. 

avatar: 

main character (insert name) you will get to customize your avatar you play as and give them a name like in undertale, this avatar will be an already made character you can edit but will already have a name and identity lore wise. 

villain: 

the voice (leads the main character to do bad things, pretending to be someone else with the false promise of freedom).

helper: 

the good voice / person before the avatar (they give hints to the main character about the evil their listening too, trying to lead them in the right path).

princess: 

partner (insert name) an avatar you get to create and name like the main character they follow you around and help you with puzzles and battles.

false hero: 

the voice (is trying to lead you to do its evil work, getting u banished even further as a result. it pretends to be the heavens, promising freedom.

dispatcher: 

the voice (the voice is the one to set u on these tasks promising freedom)
the good voice (gives you tasks to help you and tries to get you the good ending)

the donor:
the good voice (will drop hints around and will give you items needed to complete the tasks or to get over obstacles).