The Blood Berry (ブラッド・ベリー, Buraddo Berii) is Travis Touchdown's signature beam katana in the No More Heroes series. It is a seemingly primitive model that Travis obtained through an online auction, and is a trademark weapon only seen with him, along with the Tsubaki MK-III.
The name likely comes from Travis' love of the anime Pure White Lover Bizarre Jelly, as the show's main character names are Strawberry, Blueberry, and Cranberry, and may also metaphorically refer to Travis' starting days as a hitman, since winning the Blood Berry, started Travis's career. According to supplemental materials, it is a beam katana created by Wolf Vann, the same developer of the Cross Sword used by Henry Cooldown.
When activated, the frame of the Blood Berry is extracted along with the blade, and the receiver is headed by a blade attachment in the form of a pointed spike. The Blood Berry is one beam katana that cannot function properly without a receiver, and so this blade attachment allows the beam katana to penetrate matter it normally cannot by having a standard, dull receiver. The Blood Berry is also the only recognized beam katana to contain a guide bar in its design.
Despite its construction, its output differs from game to game; No More Heroes featured it as a weak initial weapon with poor features, with Desperate Struggle featuring it with considerable attack power. Nonetheless, its battery usage and slow recharge mechanics shows its vintage. In Travis Strikes Again it reappears as Travis' only weapon, but with considerable improvement in performance and recharge time. Blood Berry returns as Travis' main weapon in No More Heroes III. In the third game, it now has the ability to grow stronger and manifest smaller blades the more Travis hits somebody without taking damage. Blood Berry now also turns red and extends its length when Travis deals a Death Blow.