Keystone is an 8 foot tall Goliath who chose to sharpen his mind rather than his strength. He's lean, gray as weathered stone, and covered in blue runes he inked himself. He speaks little and notices everything, keeps meticulous notes, and has a dry humor most people miss. He once hunted bounties for a financial institution, until he saw how corrupt it was from the inside; now he works as a detective for hire and trusts no institution at all. He follows the truth rather than whoever's paying, and once he takes a case, he can't let it go.