Koru (ブリズマ,Burizuma) is a boss in Legend of Legaia. It is challenged fourth out of four consecutive boss fights in Nivora Ravine. After the Ra-Seru heroes defeat the Delilas Family and blow up Koru with the TimeSpace Bombs, the highly wounded Gi, Lu, and Che merge with Koru and order it to self-destruct, planning to blow up everything between Nivora Ravine and Sol. The Ra-Seru heroes fight Koru in order to defeat it before the explosion comes.