Steropes

Steropes is one of the Three Elder Cyclops's born to Gaia and Ouranous. With him being the younger brother to Brontes and elder brother to Arges. Like most Transcendent beings, Steropes has immense pride and initially refused to submit to Cha Yeon-woo as a familiar due to him being a mortal. However, Steropes deeply cares for his two brothers and did not wish to be separated from them anymore, eventually deciding to willingly serve him when convinced by Brontes and Arges.