Sweed, the trusted confidant of Ze Su, transforms into a monstrous, enlarged alien form in a creepy metamorphosis. Declaring herself to be the Ze Su Gate, she challenges Arc to a final battle. With overwhelming combat abilities, she fires a continuous barrage of Sweed light bullets from the countless protrusions on her body.

Using wrestling and aerial techniques, she was able to go against Arc in a fast-paced battle. She is also a skilled kicker and used her Sweed Flying Kick mid-air to knock down Arc, before using the Sweed Drill Kick and burrowing him to the ground. Once she creeped in closer to him, she released multiple Sweed Light Bullets against him, sending him flying all the way to Mt. Shishio. When the gate cover at the center of her chest is removed, a jet-black tunnel is revealed, and the energy of the star Sonia surges toward her, visible as it bursts forth.