Izuna Kokuyou  

, 黒曜 イズナ

Izuna Kokuyou is one of the main characters in Gaist Crusher series. He has the thunder attribute and is known as the thunder attribute crusher within the GCG. Initially, he was an adversary due to his animosity towards Rock Vulcan. However, over time, he became a member of the GCG as the plot unfolds.