Summoning and commanding demons takes immense spiritual potential, willpower, and no small amount of training. They're very much in control of their own minds, but will submit their power to a deserving and skilled tamer.

In fact, the first time someone new to the art summons their first demon, they have to defeat it in one on one combat before it or any others will listen to them at all. Anyone who fails the trial is killed by the demon.

[Lugh is the most human-looking of the three demons, with long flowing blonde locks, dressed in armor and carrying a mighty spear on his back.]

This is Lugh, the Celtic sun god. He's a particular favorite of mine, considering the details of his legend.