Considering the ghost was glitches you said and by the fact that this room is so hard to get to it's possible this was cut from the game. Or maybe it's just a really crapy room. Either way to answer your question Ana Bray was one of the earliest guardians in the city age. She was a hunter and an early gunslinger. Her light was so strong that during the battle of twilight gap, she left pools of light everywhere she shot her golden gun. However she was one of the many guardians to die their final death at twilight gap. And I think the foundry that made jade rabbit was daito not datco but I could be wrong.