Ep. 10: X-Men fight Inner Circle while Yui uses U-Men to research Takeo's reality-warping powers
Aired on June 10, 2011

10
The X-Men defeat Rat during their battle with the Inner Circle and uncover a mutant tracking device akin to Cerebro. They find a room where Yui holds Takeo, the telepathic son of Yui and Xavier, whose unstable reality-warping abilities are being studied using tissue extracted by the U-Men. Mastermind plans to exploit Takeo's power to conquer humanity. During the conflict, White Bishop Neuron kills Riko and Kouichi. Mastermind subsequently awakens Takeo, allowing Neuron and Marsh to trap the X-Men. Meanwhile, Xavier successfully escapes from the void.
Episodes
- Ep. 6 · X-Men return to Touhoku and face Sublime in a fierce battle
- Ep. 7 · Emma suspects Yui's deception regarding Xavier while X-Men face Inner Circle agents.
- Ep. 8 · X-Men rescue Yui from spider monster, leading to Riko and Kaga transformations and Xavier's void trap
- Ep. 9 · Yui Discovers Medication Is Viral Mutagen as Emma Confronts Mastermind
- Ep. 10 · X-Men fight Inner Circle while Yui uses U-Men to research Takeo's reality-warping powers
- Ep. 11 · Hisako Remembers Takeo and Xavier Confronts the Unstable Takeo
- Ep. 12 · Xavier urges global unity while battling Takeo’s mind, allowing Hisako to bring him peace.