Klaus von Hertzon - The Bakugan Wiki

Klaus von Hertzon (クラウス・フォン・ヘルゼン, Kurausu Fon Heruzen?) was the second-best Bakugan player in Bakugan Battle Brawlers after Masquerade, though he eventually dropped to fourth place at the end of the season. He is an Aquos brawler with a close bond with his Partner Bakugan, Sirenoid. Initially an antagonist due to Naga's brainwashing, he grows spiteful towards Alice Gehabich, Masquerade's unwitting host, for sending Sirenoid to the Doom Dimension after Naga's hold on him was broken. Nevertheless, he continues to aid the Battle Brawlers in their efforts to stop Naga.

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