弥生・B・ルートウィッジ

Tooru’s sempai and the head of the school science club who has returned to Japan.

As her name suggests, she’s half Japanese.

One mustn’t be deceived by her appearance, because she is always behaving in a calculating manner—or so she says, but Tooru thinks she mostly just relys on intuition.

But it’s impossible to know what she’s thinking behind that smile.