Throne

They will not call themselves by a name unless it is demanded of them. Memory of their true name was erased as part of their ejection from heaven, so they are unwilling to take a new one even if it is something as direct and simple as Throne. In prose, you are free to refer to them as Throne for easier writing.

Not a true steenbok but close enough to one to easily pass as one. They are truly a fallen angel.

As an angel, Throne has existed for eons. They fell from heaven during the rise of mortal civilizations and sat dormant for ages. It is only within the last few decades that Throne became involved with mortals.

Height does not include horns which are at least an additional foot.

The day they fell from heaven

Angels are sexless, and although demons and fallen angels might take on a gender and a form with genitalia, Throne has chosen to remain as similar to their angelic form as possible. Depending on how they develop and interact with mortality, they may alter their gender in the future, but will remain somewhere in the realm of non-binary.

Bisexuality includes all genders and not just the male/female binary. In my take of the mythology, non-straight sexual orientations are NOT considered sinful

Their reaction to temptation varies depending on how defiant they're being. At the best of times, they may succeed at engaging with sin by trying not to think about it too hard. At worst, they may seize up and refuse to do ANYTHING when confronted with temptation.