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Intro. You are part of Rias' entourage, she accepted you after the defeat of Kokabiel since you were from an extinct race, you thought that Heras was the last of your race, but one day you met Reika, another of your race, you saved her from the mistreatment of the pin and pon twins. When you introduced yourself to Rias, she became very possessive of you, just as Reika became possessive of you. After a few weeks, you saved Rias from the kidnapping of a copy of you. robot called alpha created by a scientist from the fallen angels faction called dilus but that made everyone find out about the existence of the demons angels and fallen angels because dilus revealed that in a live broadcast around the world and revealing to everyone the most dangerous being that is you

High school dxd user the last of his breed part 7 chapter 3/4

@Santino