Gyokuran

Gyokuran was the team's archaeologist. Gyokuran was Shion's childhood friend; the two also went to school together with Shukaido. Gyokuran possessed psychic powers, but had difficulty controlling them and as a result had to wear special earrings to contain his power. Gyokuran unwittingly became Shion's greatest rival, due to his being everything that Shion could not.~! When Gyokuran opposed Shion's idea of going down to earth after the Homeworld was destroyed, Shion became belligerent and Gyokuran had him thrown in the anti-Sarches brig. After the rape of Mokuren, Gyokuran went insane with rage at Shion, suggesting he be permanently exiled. Jinpachi says that Gyokuran always admired Shion and cared deeply for him. Rin found this shocking, and refused to believe it. Gyokuran died from the virus first.!~

(Source: Wikipedia)