Zeru was a decent villain during the Dark Tournament Saga.
He was the apparent leader of the first enemy team, surprising everyone by going third.
His opponent was Hiei and both demons specialized in fire
His greatest move was to turn himself hotter then you could imagine.
He arguably came the closest to killing Hiei than anybody else in the series.
But luckily, Hiei’s magic eye saved him from death.
Zeru was the first victim of the Dragon of the darkness Flame. Such an epic moment.
The only thing left of him was a shadow outline of his body.