She's a virtuadoll that was created around the same time as µ.
She was forced to take a smaller form in Mobius because of µ’s vast power.
She wants to stop µ, who has become steadily more unhinged since creating Mobius, and return to the real world. To this end, she selects the main characters and grants them the ability to fight.
In contrast to the lovely, immaculate, and perfectionist µ, her personality is bright, cheerful, and casual, which makes it easy for her to make friends.