Heinkel: Your other personalities have been suppressed, but not erased. Like Yumie, they can be released. Not by removing your glasses, but by certain code phrases. I know your codes.
Yumiko: H-how long have you known?
Heinkel: Since I was first partnered with you.
Yumiko: But — why would you–?
Heinkel: Because I wanted you to be happy! For as long as you could!