Arkim is an old hermit standing in the center of the bat cave. He has no idea why he lives there but doesn't seem to be willing to change place. He likes experimenting with the bats living around him, in the cave. At first he doesn't know why he experiments but after a second you realize how mad he is, he likes cutting them to see how they work.

If you think a bit, you'll find out that helping him isn't bad. Just gather some Bat Wings and Arkim will give you some EXP and GP. This is one of the most used daily quest of the game.

You can find his script here.