TV-Series
Description
Lena Isis operates as an Aquos brawler for the Gundalian Empire under Emperor Barodius. As a Gundalian Agent commanded by Ren Krawler, she infiltrates Bakugan Interspace to recruit human battlers for Gundalia's war against Neathia. Her primary Bakugan partner is Aquos Phosphos, equipped with the Terrorcrest battle gear. Lena sports distinctive blue hair arranged in a bun and Quevedo-style glasses, though these features diminish in her true Gundalian form.

Initially loyal to Barodius, Lena exhibits a reserved and analytical demeanor outside combat but adopts an arrogant stance during battles. She shares strong bonds with her teammates, particularly fellow agent Zenet Surrow, and consistently prioritizes Sid Arkale's safety. Her partnership with Phosphos involves mutual care, demonstrated when Phosphos shields her from Kazarina against impossible odds. Lena also harbors unspoken feelings for Mason Brown, reacting with visible emotion upon reuniting with him.

Her narrative arc begins with recruitment battles alongside Sid, including a loss to Dan Kuso and Marucho Marukura. After failing to sway the Battle Brawlers, she and her team face reprimands from the Twelve Orders. During a mission to stop Shun Kazami from activating Neathia's second shield, Lena suffers consecutive defeats against him while partnered with Kazarina. This failure, followed by her retaliatory ambush against Kazarina for perceived betrayal, results in her capture and disposal.

Lena later resurfaces imprisoned in stasis tubes within Kazarina's lab alongside Jesse Glenn and Zenet Surrow. After Sid escapes, Kazarina hypnotizes Lena, forcing her to attack Neathian allies like Fabia Sheen and Nurzak. Kazarina's death breaks the hypnosis, freeing Lena to defect. She then aids Neathia against Barodius alongside Jesse and Zenet, participating in Neathia's final defense before returning to Gundalia post-emperor's defeat.

Her combat record includes four confirmed victories without any documented solo matches. Though tactically sharp—such as identifying cloned Bakugan—her overconfidence often sabotages these insights. Even after joining Neathia, she retains Gundalian battle gear and tactics without adopting Neathian equivalents.