Changes

{{Aquos Tabs}}{{BQuoteCharacterTabs|color bio= blue|Patience is a virtue. As is loyalty. But that's something you know nothing about. Perhaps that is why you will be always at a disadvantage. The bond the brawlers share as a group is more powerful than anything. There is much you can learn from them.|'''Klaus''' to [[Spectra]]|''[[Brontes' Betrayal]]''no}}

|image = [[File:Klaus.png|170px300px]]|voiced by = [[wikipedia:Takayuki Kondō|Takayuki KondoKondō]] <small>(Japanese)</small><br/> [[https://www.behindthevoiceactors.com/Jeremy-Harris/ Jeremy Harris]] <small>(English)</small>|age = 18 <small>([[Bakugan Battle Brawlers|Battle BrawlersBB]]) </small><br/>21 <small>([[BakuganBattle Brawlers: New Vestroia|New Vestroia]])</small>

|guardian = [[Sirenoid]]

| race = [[Human]]

|first = [[Bakugan Stall]]|occupation = Head of the Klaus Foundation|faction = [[Battle Brawlers]]<br/>[[Bakugan Battle Brawlers Resistance]]|status = Alive}}{{BQuote|color = blue|Patience is a virtue. As is loyalty. But that's something you know nothing about. Perhaps that is why you will be always at a disadvantage. The bond the brawlers share as a group is more powerful than anything. There is much you can learn from them.|'''Klaus von Hertzon''' (Japanese version: to [[Spectra]]|''[[Brontes' Betrayal]]''}}{{nihongo|'''Klaus Von Hertzenvon Hertzon'''|クラウス・フォン・ヘルゼン|Kurausu Fon Heruzen}}) used to be was the [[The Top Brawlers|second-best Bakugan player]] before in ''[[Bakugan Battle Brawlers]]'' after [[Masquerade]], though he lost eventually dropped to fourth place at the end of the season. He is an [[Aquos#Legacy|Aquos]] brawler with a close bond with his [[Partner Bakugan]], [[Sirenoid]]. Initially an antagonist due to [[Dan KusoNaga]]'s brainwashing, he grows spiteful towards [[Alice Gehabich]], which caused Masquerade's unwitting host, for sending Sirenoid to the [[Doom Dimension]] after Naga's hold on him was broken. Nevertheless, he continues to drop down aid the [[Battle Brawlers]] in their efforts to fourth placestop Naga. Klaus was first seen  He returns as a supporting character in the second arc of ''[[Bakugan Battle Brawlers: New Vestroia]]'' , briefly assisting [[Ace Grit]] in a brawl against [[Mylene Farrow]] and became a supporting character sending [[Chan Lee]] to back up Alice when he suspected the [[Vexos]] would go after her. Klaus also makes an appearance in the ''[[Bakugan Battle Brawlers (Video Game)|Bakugan: New VestroiaBattle Brawlers]]''video game.

===Anime=======[[Bakugan Battle Brawlers]]====

His [[attributeAttribute]] is [[Aquos#Legacy|Aquos]] and his [[Guardian Partner Bakugan]] is [[Aquos#Legacy|Aquos]] [[Sirenoid]], who he shares a bond with. He was [[Marucho]]'s rival because he sent [[Preyas (Marucho Marukura)|Preyas]] to the [[Doom Dimension]] in their first battle. After joining [[Masquerade]]'s Top Ranked Brawlers team, he fights [[Dan]], [[Runo]], and Marucho alongside his teammates, [[Julio]] and [[Chan Lee]], where he showed that he obtained Preyas from the Doom Dimension. He over used Preyas to make Marucho upset, eventually losing him to Marucho due to Runo's Ability Card, '''Pure Light'''. After that he decides to use a Mind Ghost to send Preyas back to the Doom Dimension, however Marucho is able to save him using the Dive Mirage Ability. Thus, he loses his Griffon to the Doom Dimension. They lose when Marucho activates the '''Fire, Water, Light Triple Node''' and Runo's '''Cut-in-Saber''' Ability Card, making Drago evolve. When he brawls Masquerade, he doesn't want to risk his Sirenoid. But when he activates an ability, she defies his orders and [[Dual Hydranoid]] sends her to the Doom Dimension.

====[[Bakugan Battle Brawlers: New Vestroia]]====

He comes to the aid of [[Ace]] and [[Midnight Percival]] during their battle against [[Mylene Farrow]]. Both of them managed to fend Mylene off, with Klaus casually remarking that she was very beautiful, as usual. He then proceeds to annoy Ace by continuously calling Ace "Boy". When [[Baron]] catches up, Klaus helps them in warning Dan about the Vexos targeting the Attribute Energies.

In ''[[Brontes' Betrayal]]'', he helps the Brawlers escape as Spectra teleports into his castle and search searches for them , only to find Klaus alone, who . Though Klaus tries to reason with him, but Spectra looses his patience and leaves.

In ''[[Samurai Showdown]]'', he asks the Brawlers about the situation and tells Baron and his sister, [[MaronLeltoy]], was worried about him and traveled to Earth.

In ''[[Phantom Data Attack]]'', he congratulates the Brawlers after Drago destroyed the B.T System and also informs them that the Vexos had escaped to another dimension after their defeat. He and Sirenoid stayed on Vestal in case they appeared again and because of his business reunions. This marks his final appeareance appearance in the series.

===Games=======Bakugan : Battle Brawlers=video game===In [[Bakugan Battle Brawlers (video game)|''Bakugan : Battle Brawlers]]'', Klaus battles with Sirenoid in every one of his decks. Once he is hard mode, when you battle him at the park, he uses a deck similar to the one he used against Alice, containing Aquos Sirenoid and a Pyrus [[Siege]]. He also used a Haos [[Centipoid]], as [[El Condor]] is not available in the game.

===Anime=======Bakugan Battle Brawlers====*[[Aquos#Legacy|Aquos]] [[Sirenoid]] ([[Guardian Partner Bakugan]])

*Aquos [[Preyas (Marucho Marukura)|Preyas]] (Taken from [[Marucho]], later returned)

*[[Ventus#Legacy|Ventus]] [[Bee Striker]]*[[Darkus#Legacy|Darkus]] [[Centipoid]]*[[Haos#Legacy|Haos]] [[El Condor]]

*Haos [[RobotallianRobotallion]]

*[[Pyrus#Generation 1|Pyrus]] [[Siege]]

====Bakugan Battle Brawlers: New Vestroia====*[[Aquos#Legacy|Aquos]] [[Sirenoid]] ([[Guardian Partner Bakugan]]) ==Trivia==*Klaus has two ways of saying his name, Klaus (claws) or Klaus (clows), although the correct pronunciation is the latter.*He looks similar to [[w:c:yugioh:Aster Phoenix|Aster Phoenix]], a character from ''Yu-Gi-Oh! GX'', or [[w:c:yugioh:Maximillion Pegasus|Maximillion Pegasus]] of ''Yu-Gi-Oh!''.*He also looks similar to [[w:c:pokemon:James (anime)|James]] from ''Pokemon''. They both also come from very rich families.*Klaus is the only returning brawler who is not a main character to win a battle in Bakugan Battle Brawlers: New Vestroia.*Klaus has an interest in Alice. When he met Alice she told him the truth about her. After knowing the truth of her being Masquerade he was interested in her. In Bakugan: New Vestroia, he even took the liberty to send Chan Lee to check on Alice.*His personality resembles [[w:c:inazuma-eleven:Edgar Valtinas|Edgar Valtinas']] from ''Inazuma Eleven''.*[[Jesse Glenn]] resembles him to a degree.

==Battles=====Anime=======Bakugan Battle Brawlers==Brawling Record=={| styleclass="float: left; width: 500px; wikitable" width="3060%" cellspacing="1" cellpadding="1" border="1"! colspan="2" style="background-image: initial; background-attachment: initial; background-origin: initial; background-clip: initial#EA4135; background-color: red; text-align: center; background-position: initial initial; background-repeat: initial initial#FFFFFF; " |Bakugan Battle Brawlers

! Opponent | '''Opponent''' |width="20%"| '''Outcome'''

| [[Dan Kuso]], [[Runo Misaki]], and [[Marucho Marukura]] (tag with [[Chan Lee]] and [[Julio Santana]]) || Lose

|[[Centorrior]] and [[Druman]] (tag with [[Dan Kuso]], [[Marucho Marukura]], [[Runo Misaki]], [[Julie Makimoto|Julie]], [[Julio Santana]], [[Billy Gilbert]], and [[Komba O'Charlie]]) || Win

 {{-}} ====Bakugan Battle Brawlers: New Vestroia===={| styleclass="float: left; width: 500px; wikitable" width="3060%" cellspacing="1" cellpadding="1" border="1"! colspan="2" style="background-image: initial; background-attachment: initial; background-origin: initial; background-clip: initial; background-color: lime; text-align: center; background-position: initial initial; background-repeat: initial initial#90D664; " |Bakugan Battle Brawlers: New Vestroia|-!Opponent!width="20%"|Outcome

{{==Trivia==*Klaus has two ways of saying his name, Klaus (claws) or Klaus (clows), although the correct pronunciation is the latter.*He resembles Maximillion Pegasus from ''Yu-Gi-Oh!''. He also bears a resemblance to Aster Phoenix, a character from its sequel, ''Yu-Gi-}}Oh! GX''.*He also bears similarities to James from ''Pokemon'' in their hairstyles and their backgrounds as coming from rich families.*Klaus is the only returning secondary brawler to win a battle in ''New Vestroia''.*His English voice actor, Jeremy Harris, would later voice [[Jesse Glenn]].  {{Secondary BB main characters}}{{Main NV main characters 2}}[[de:Klaus von Herzen]][[es:Klaus von Herzen]]