Animes watched
The dark Lord personally visited and asked flio to join the demon army but was rejected. The hero also led an army to force flio to join him. With no choice, flio teleported his entire mansion and land with rys and the adventurer team to another new place. Angered by his departure, the dark Lord summoned his army to attack the hero's troop. The hero ran away.
Re:Monster #05:
Goburou rescued the elf chief's daughter from human kidnappers and befriended the elf tribe. Goburou's companions evolved again and they were renamed. Kichi confessed his feeling to earthe and was accepted. When the elf asked ogurou for help against the human army, he named his tribe as Merchancy and set off for their first mission.
Tensei shitara Dainana Ouji Datta node, Kimama ni Majutsu wo Kiwamemasu #05:
The demon evolved and even tao and syphie could not defeat him. Lloyd easily destroyed the demon with multiple magic but passed the credit to his fake identity. Prince Albert asked llyod to be named as one of the king candidate bit llyod rejected.
Tsuki ga Michibiku Isekai Douchuu 2nd Season
#17:
Some humans turned into monsters attacking the people. Makoto and his subordinates had to join in to aid the students fight the monsters.