1 - Son Gokou

2 - Vegeta

3 - Yoh Asakura

4 - Yusuke

5 - Hiei

6 - Kurama

7 - Kyoshiro Mibu

8 - Ban Mido

These characters have to face an item called Bakuju using nothing but their will. It gets to latch onto them, and they have to resist it from taking over.
http://www.mangafox.com/manga/flame_of_recca/v12/c112/6.html
http://www.mangafox.com/manga/flame_of_recca/v12/c112/7.html
http://www.mangafox.com/manga/flame_of_recca/v12/c112/8.html

Can any of these characters stop something from taking over their brain and destroying everything that they are? Or do they all get turned into puppets to be used by Bakuju?