A question for Megaten veterans

So I am currently playing through my first game related to Shin Megami Tensei (that being devil survivor) and while I have had a blast with it so far I wondered can the demons of Megaten evolve by leveling up? I know that you can evolve your demons by fusing them which each other (one of my favorite aspects related to the game tbh) but I dont know if they can evolve by leveling up.

I might go to the wiki to find answer to this question , but if you want to help, feel free