Memory manipulation was required for the final stage of her plan to inflict further despair. That’s
why she wanted to test it, and on herself. She arranged for Matsuda to take away her memory,
making her a test subject for that very memory manipulation.

“I guess this is all I can expect from one little experiment… Just becoming forgetful is only half
of what I need… I guess Matsuda just didn’t try hard enough. Well, once I take care of it, I’m
sure it’ll turn out perfectly. Taking over a loved one’s impassioned research… I’ll be sure to put
it to use in the most despair-inducing way possible.”