Clockwork_055
Dude are you going make him some kind of hidden protector and leaving momonga as guild leader and he will also come to new world then this novel will not move too far I have seen plenty overlord fic In which mc and momonga both travel to new world this does not work well you see trying to maintain a balance between them will be difficult if novel uses momonga as main plot charector then people will be dissatisfied with the mc being a follower or something if you make mc as main plot charector then people will be dissatisfied with you since you undermined momonga soo yeahh don't doo that just make mc as guild leader and only he will go to new world
Author-sama, I present to you my choices for the MC's personal NPCs, Grayfia Lucifuge Unohana Retsu Erza Scarlet With Grayfia and Esdeath you could create a kind of rivalry based on their ice powers. Unohana could be some kind of oni đč. and Erza looks like an angel to me with her Heaven's Wheel Armor.