Remnants gunslinger (rwby x reader)

Though the galaxy a legend is told. On a distant planet, a grim fortress stood (no pun intended)
Until a deadly force parted the heavens and descended upon the keep though brought to ruin. The ashes of that place hold an artifact of impossible power.... a gun that can kill the past. Over time, the fortress was rebuilt, and some who hear the legends would risk every thing just for another shot. To claim there prize and make what was done, undone. They must...... ENTER THE GUNGEON
Your name is (Y/N) (l/n) and you are a human but a special human, your the only human to get the gun that can erase your past but how will you react to the world when you exit the Gungeon and you see what the world has become will you stay the gunslinger...or will you go into hiding but there's something that you didn't know that may affect your decision. I don't own enter the Gungeon or rwby I wish I did, but I don't.