Yumiko

Yumiko is a main character in the story Summonoid.

Story
Yumiko was made the same time as Serendipity. She managed to escape while the SA's were disabling Serendipity's feelings. Yumiko found Bubbles and Libra's hiding place, and became friends with the 2 ally summonoids and the ally villagers Icona, Avelin, Posalind, and Callie (villager). She told her new friends that she wants to be as natural as she can be, and wants to be fully in control of her own actions, thoughts, and feelings. Bubbles and Libra, along with their ally villager friends, managed to make a disabler that prevents the SA's from being able to disable Yumiko's feelings, thus giving her full control over herself all the time.

She, along with Summonine, Serendipity, and Linette sing "If You're Happy and You Know It, Heal Yourself" in the Ambivalence Ending.