If you were supposed to get an email from the forum but didn't (e.g. to verify your account for registration), email Wes at stararmy@gmail.com or talk to me on Discord for help. Sometimes the server hits our limit of emails we can send per hour.
And, yeah, it's from Battle Angel Alita: Last Order (chapter 96, page 22). I've wanted to use it for a while, but never got around to it. The whole cat combo finally got me to do it : )
Not that it's a huge mystery I'm sure, but my avatar is from a NanoFate (That is Nanoha x Fate) 4koma if I recall. I forget the context however, but I think it involved the death glare from Nanoha being directed at Teana or something...