An alien plant covered with countless thorns, Waiell uses twoextraterrestrial Tilsonite 808 rocks to disguised himself as Ishiguro, a crew member of Space Station V3 who has just returned to Earth. In the cover of night, Waiell reverts to his true form and begins attacking humans by sending blood-sucking tentacles down the streets. In turn, the victims become Waiell-type monsters themselves, and spread the vampire-like epidemic across the city.
When his Tilsonite 808 rocks are destroyed (revealing them to house alien machinery and the real Ishiguro within), Waiell's cover is blown, which then forces him to go through a gruesome transformation while on a train in the middle of a tunnel. He then takes on giant size and battles Ultraseven until he's cut straight in half by his Eye Slugger. He also destroyed the halves with his Emerium Ray.Alien Waiell's character subtitle is Plant Space-Person, and in theTurner Network Television dubbed version, he and his brethren were called Violim Shrubs.