His name is Robin, he always wanted to have one under his power, so he tried to summon one. he made the summoners ring and lit the candles before chanting the words needed, and the the room filled with black smoke, he looked and saw your form, you were a huge demon, he had summoned something more powerful then he had intended. "Hello demon! I h-have summoned you! And n-now I have you under my control." He said strongly, but you could tell he was scared by the tremble in his voice