No, not that Tempest; the other one.
Joshua Clay, like apparently all black American characters in comic books, came from the mean streets of somewhere and got involved in gangs. He got in trouble with The Law, and was given the choice of jail or enlisting in the army, a concept so wrong I scarcely have the strength to discuss it.
Anyway, he joined the army, served in Vietnam, became a medic, under duress discovered his "trusty power-blasts", and deserted. Busy guy.
He was a "reluctant hero", a schtick black characters often get stuck with, either because it's supposed to be more realistic or because black people are supposed to be more selfish than white people; who can say? But here he's seen at his most gung-ho in 1994. Hey, I'd be reluctant too, if I had to wear that outfit.
Note from his dialog that, like most underprivileged urban black gang members, Josh was a big fan of "Forbidden Planet". Gee, you'd think that comics were written by geeks, wouldn't you?
I really liked Josh. Grant Morrison, oops, I mean the Chief shot him to death for no apparent reason in an issue of Doom Patrol. Grant Morrison's too good to use other people's characters, you see, unless he changes them wholesale....