Quests and NPCs

Project Alytro will most likely have the following three types of NPCs.

Quest NPCs - NPCs that distribute quests.

Enemy NPCs - Enemy Mobs that you can kill for currency / exp / drops and such.

Market NPCs - NPCs that sell you weapons / armors / items.

Interactive NPCs - NPCs with no purpose but still can be interacted with

Non-interactive NPCs - NPCs solely for decoration, cannot be interacted with.

Specialty NPCs - Limited time NPCs that may distribute quests, be an enemy, or sell you items. (Can only be found during holidays or events.) 

Quest NPCs
None yet.

Market NPCs
None yet.

Specialty NPCs.
Mr. Alytrian - Specialty NPC, the game guide and tutorial.

B A R T - Specialty NPC, purpose is unknown.

NPC Appearance.
NPCs will (obviously) vary in appearance. A few styles were leaked by Nova.