Tierra

Masaya's longtime partner, and one of only two AIs in the world. The program Masaya wrote in middle school has evolved through repeated modifications until it has become sentient, but Masaya does not know why only Tierra evolved.
Previously, she was only a personality on the computer, but in the chaos of joining "M.C.", she gained a body.

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She often has a gentle smile on her face, and is a woman who gives others a sense of security and relief. She has a calm personality and is always attentive to her surroundings. She says what needs to be said and behaves the way she should, but she seems to be a little soft on Masaya.

At first glance, she seems to be able to do anything and everything, but behind that there is a lot of trial and error going on.

"I will say it again and again: let me help you."

(from the game's website)