>>13227982 Who the fuck is this Mao you faggots speak of? I see double-Geass. Damn!
Ok. Years before when Geass is set, CC made a contract with a young Chinese boy, presumably just like she did with Lelouch.
When she gave him his power, it manifested in the form of him being able to read peoples minds. The problem is, his power is always on and can never be turned off, so expose to people is maddening to him... the lone exception being CC, as since Geass powers can't be used on her she's the only person he can be around without his head being flooded and overwhelmed.
At some point, CC ditched him. Without CC has instability got worse, and his fixation on her got even stronger.