Onibaba exited the Breach on May 15, 2016, with an estimated mass of 2040 tons. Visual surveillance suggested crab-like appearance, which was confirmed when Onibaba made landfall in Tokyo. Coyote Tango responded, with pilots Stacker Pentecost and Tamsin Sevier.
Onibaba displayed mixed behaviors, aggressive towards infrastructure but primarily defensive when confronted with active opposition. Striving to avoid direct confrontation in the center of Tokyo against a dug-in and heavily armored Onibaba, Coyote Tango decoyed the kaiju to a less densely populated area, saving thousands of lives.
Like the crustaceans it apparently took its shape from, Onibaba was vulnerable along the underside of its exoskeleton. Postmortem analysis indicates its primary foreleg claws had a crush force of 50,000 psi. These measurements are confirmed by analysis of damage to Coyote Tango’s cranial frame and Conn-Pod. Its cephalothorax was heavily armored and withstood both physical and energy assaults from Coyote Tango.
Kaiju Blue and other associated postmortem toxicity from Onibaba was moderate. Few of its organs could be recovered intact. Some other tissue and exoskeletal material was preserved for Kaiju Science use. Specific experimental results using these materials are noted in Kaiju Science reports.