I believe it is literally only used in the EW Paladin cape. If you mean more generally, I believe that symbol is based on the cross of Santiago. Turned blue and made less Crusader-y. Pic related:
https://i.imgur.com/SSscN6I.png
What a cope. Never seen anyone get hit by the LIVE, LOVE, LAUGH reply in the face of demanding quality from a multi-billion dollar company. Anyway, Awesome has a point. Let them live their life, bro.
