"Tega Sword Blue" (Japanese テガソードブルー) is a mecha/robot form from the 49th Super Sentai series "No.1 Sentai Gozyuger" (Number One Sentai Gozyuger), which aired on TV Asahi from February 2025 around the Super Sentai franchise's 50th-anniversary period. It corresponds to the individual battle form of the team's Blue member, Gozyu Leon (lion motif). The series' central gadget is the Tega Sword itself: a sentient, talking weapon that chooses the Gozyugers and transforms into a robot, reflecting the show's core concept of "transformation weapon = robot." Tega Sword Blue is the Gozyu Leon-tailored robot configuration of this base mecha.

The foundation is the Tega Sword robot, which is operated via so-called Sentai Rings (interchangeable rings that trigger sound effects, finishers, and the powers of past Sentai warriors); a pendulum/clap sensor responds to hand-clapping with matching sounds. The blue configuration is completed by combining the base robot with Gozyu Leon's personal weapon, the Leon Buster 50, which mounts as a cannon on the right arm, and by placing the blue "Tega Sword Blue" Sentai Ring on the head.

The DX toy is made by Bandai (Japan) and was released in 2025 under the PROJECT R.E.D. toy line, mostly in plastic (ABS/PVC) with light and sound features. The blue form is achieved by combining the base DX Tega Sword item (first sold 15 February 2025) with the separately sold DX Leon Buster 50, which includes the blue Sentai Ring (clear blue parts with gold paint). Like the entire Gozyuger line, Tega Sword Blue was released in Japan only; there is no Power Rangers adaptation, and it therefore never appeared as a Power Rangers toy.