The OathKeeper from Kingdom Hearts, a keyblade that is symbolic of Sora's memories of Kairi.
Roxas is also has wielded the OathKeeper, but also along with the Oblivion.
Notes: While it's shorter than most keyblades... I made this one a bit more shorter than intended. I plan to fix that once we get some more building tools.
Feel free to post feedback and whatnot in the comments!