Blaze is a nickname given to me by my best friend Amelia. She walked in while I was playing Ace Combat Squadron Leader, overheard my wingmen refer to me as Blaze, assumed I picked the name myself (it's the default name, can't be changed) and it just kinda stuck. It's also why a few of them refer to me as The Demon of Razgriz, thanks to my legendarily short temper and the Razgriz patch on my leather jacket Amelia gave me as a joke. Ever since then most of my friends call me Blaze. So much so that I'm seriously considering changing my name legally, since I hate my original name anyway. On the odd occasion I'm required to give a second name, I give the name Fielding, just to see if anyone gets the reference.
The 163 at the end is the number of my old Air Cadet squadron here in Coventry. The 163 Coventry Phoenix Squadron, based in Canley. I achieved the rank of Cadet First Class, hence why another of Amelia's game based jokes is to refer to me as 'Soldier First Class', hence the FF7 dog tag around my neck.
It's also why my personal emblem is the phoenix, or more specifically the White Phoenix. Our old C.O would always say that when life knocks us down, we make a choice. We can accept it and say that's how life is, or we can rise like a phoenix from the ashes, burning away the darkness with a pure white flame of hope. Ever since then I adopted the White Phoenix and the associated phrase under my avatar as my personal icon.