Not sure if anyone has noticed/pointed this out yet, but the level 20 "Revamp" skill in the Engineering tree has its art based on Kaneda and his laser gun from the movie "
kaneda akira 3d model
Kaneda's Laser | Borderlands Wiki | Fandom
AKIRA - KANEDA LASER FIRING" Premium T-Shirt for Sale by SysOverlord | Redbubble
AKIRA - KANEDA LASER FIRING" Hardcover Journal for Sale by SysOverlord | Redbubble