My username is my pen name and my public online alias, basically. I prefer to separate my personal privacy that way.
Edelclere is a portmanteau of two words: Edelgard and Hauteclere.
Edelgard is the name of one of my favourite characters from the Fire Emblem franchise. My profile picture is a drawing of her that I had commissioned on her birthday this year.
Hauteclere is the name of a pretty sweet axe from the Fire Emblem franchise. It belongs to a character named Minerva, who is also in my list of favourite Fire Emblem characters.
Both Edelgard and Minerva are canonically axe-wielding characters. Maybe I just have a thing for girls with axes…