Mitsunari Yanagisawa was an ok character on the show. He was one of the new psychics asked by Genkai to test the group.
Yu Kaito was surprised when Karama temporarily knocked him out with plants.
Botan tried a technique to prevent anyone from being kidnapped.
Kuwabara was unsurprisingly his victim.
For which Yusuke Urameshi had to hit him as hard as he could to turn him back to normal.
After his defeat, he helps out the heroes briefly with his impressive power of copy which copies both the body and the mind.