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|first = [[The Story of Vestroia]]

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'''Sirenoid''', {{nihongo|'''Siren'''|セイレーン|Seirēn}} in the Japanese version, is a mermaid-like [[Bakugan]] that soothes souls with her magical lyre. She is the [[Partner Bakugan]] of [[Klaus von Hertzon]].

In Japan, its Aquos version in BCV-02 it comes with 250 Gs or 450 Gs.

==Trivia==