|Real name||Mythic Beast Darkness Cerberus|
|Nicknames|| Beast of Darkness|
King of Shadows
|Occupation|| Leader of the Mythic Beasts|
Partner of Chrystal Rey
|“|| My duty is to protect Chrystal, but also to defeat them.|
– Darkness Cerberus
Not much of Cerberus' past is known. The only known thing is that he once served the Chaos Empress, Eris and as leader of the Mythic Beasts. After many years, eventually came into the hands of young Chrystal Rey. Cerberus bonded with Chrystal about two years prior to the start of the series, being her only friend while at Neos Academy.