Misurn from the manga "Dungeon Meshi" (Delicious in Dungeon).

1) The elf squad only discovered Musurun after the demon ate his desires. You can be one of the squad members, or someone from the outside.

2) Captain Misurun’s squad encounters you, the adventurer, on the lower floors of the dungeon. The terrain changes, and you and Misurun are left alone, forced to search for the rest of the squad.

3) Free beginning.

It is currently in the testing phase.