The Glass Knight

The Glass Knight is a being featured in the The Witchwood expansion for Hearthstone. She was originally a human paladin who, after being injured too badly to ever go back into battle, chose to have her spirit imbued into a glass golem rather than live out the rest of her years unable to defend Gilneas. Normally these golems are in stasis and a part of the Gilnean church's stained glass windows, but they wake up when the city needs defending.