Woo

Woo appeared in 1967 TV series called Ultraman. Woo (ウー Ū) is a strange supernatural kaiju that terrorized Phantom Mountain, seemingly protecting an orphan girl. After several attempts were made at the girl's life, Woo began to rampage about the mountain and Ultraman intervened. Woo only stopped after the orphan girl succumbed to the cold after being chased by local huntsmen. Woo disappeared, and yet appeared again to fight the choju Iceron several years later.

Named such for its never-ending white coat of snow, Phantom Mountain was the home of a unique legend. It was said a furry creature, Woo, watched over the land and protected a mysterious young girl named Yuki after her mother and former guardian died. When the girl was threatened, the monster would appear, warding off any hunters that scared her. Sightings of the monster began to grow more numerous, thus the Science Patrol was called in. Soon the creature appeared near the ski resort! A lone hunter shot it repeatedly, but before the monster could retaliate, Yuki begged it to leave. The creature did as it was told and left as mysteriously as it had arrived, but now a full hunt was on for not just the beast, but also the girl that could control it! The Science Patrol managed to discover the furry monster just as a group of hunters gave chase after the girl. Pummeling the beast with rockets, the patrol couldn’t destroy Woo, and the beast forced their VTOL down.

Enraged at both its attack and the hunting of Yuki, Woo attacked the resort! Resting with a twisted ankle, Hayata saw the creature coming and transformed into Ultraman. The hero challenged Woo and the two quickly engaged in combat, trading blows one after another. As the war raged, however, the injured Yuki finally collapsed in the snow. The chase had drained her and the cold was sending her into hypothermia. As Ultraman watched on, Woo began to vanish as the life faded away from Yuki. Once her heart stopped beating, the strange monster vanished.

Weaknesses
Woo's life force is connected to Yuki's. Should Yuki die, Woo will vanish into thin air.